History of Services 101 - 150

Service 101

1st Generation (1971 - 1990)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ New Bridge Rd	1971	11 April	Introduced between Serangoon Gdn Ter and New Bridge Rd Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1972	18 June	Amended to ply Bendemeer Rd towards New Bridge Rd Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	1 October	Serves new merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1977	31 October	Amended to skip Chartwell Dr, Burghley Dr and Berwick Dr with the introduction of Service 217.
		1981	10 May	Skips bus stop before Braddell Flyover along Lor Chuan.
		1983	6 February	Amended to ply CTE towards Serangoon Gdn Ter with the closure of temporary slip road between Braddell Rd and Lor Chuan.
			20 June	Amended back to ply Lor Chuan towards Serangoon Gdn Ter with the opening of new link road between Braddell Rd and Lor Chuan under Braddell Flyover.
		1987	3 May	Amended to terminate at New Bridge Rd Ter.
			6 June	Amended to the relocated New Bridge Rd Ter.
			27 September	Amended to ply the extended Eu Tong Sen St towards Serangoon Gdn Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Serangoon Gdn Ter to facilitate the second stage of road expansion along New Bridge Rd.
	Serangoon ↔ New Bridge Rd	1988	13 March	Amended to Serangoon Int.
			20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1990	2 September	Integrated with Service 83 and discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	Serangoon ↺ Buangkok Cres	2004	15 February	Introduced between Serangoon Int and Buangkok Cres (Loop), replacing Service 328.
	Serangoon ↺ Buangkok Lk	2005	14 August	Amended to loop at Buangkok Lk, skipping Buangkok Cres.
		2009	19 April	Serves new pair of bus stops outside Blk 834 and outside Hougang Polyclinic along Hougang Ave 4.
		2011	3 September	Amended to Serangoon Integrated Transport Hub.
			3 December	Designated wheelchair-accessible bus service (WAB).
		2017	9 July	Serves new pair of bus stops outside and opposite Blk 991B along Buangkok Lk.
		2018	23 December	Serves new bus stop opposite Blk 984A along Buangkok Lk.
	Serangoon ↺ Buangkok Cres	2019	25 August	Amended to loop at Buangkok Cres after Buangkok Lk.
		2022	13 March	Serves new bus stop outside Blk 991A along Buangkok Cres.

Service 101A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ New Bridge Rd	1971	11 April	Introduced between Serangoon Gdn Ter and New Bridge Rd Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1972	18 June	Amended to ply Bendemeer Rd towards New Bridge Rd Ter with the conversion of Serangoon Rd to one-way road.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Discontinued under 1974 Bus Rationalisation.

Service 102

1st Generation (1971 - 1977)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ Prince Edward	1971	11 April	Introduced between Serangoon Gdn Ter and Prince Edward Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to United Bus Company.
		1972	18 June	Amended to ply Bendemeer Rd towards Prince Edward Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Converted to semi-express service under 1974 Bus Rationalisation.
			8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
			14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1977	31 October	Discontinued.

2nd Generation (1981 - 1983)

Operator	Route	Year	Date	Service changes
	Jln Kayu ↔ New Bridge Rd	1981	2 March	Introduced between Jln Kayu Ter and New Bridge Rd Ter, operating on weekdays and Saturdays only.
		1983	14 November	Discontinued.

3rd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	Hougang Ctrl ↺ Jln Kayu	2015	20 September	Introduced between Hougang Ctrl Int and Jln Kayu (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 2330 hrs daily. Wheelchair-accessible bus service (WAB) at launch.
	Hougang Ctrl ↺ Seletar Aerospace Ave	2018	14 October	Extended to loop at Seletar Airport PTB.
		2019	22 September	Serves new pair of bus stops opposite and after Seletar Camp along Seletar Aerospace Dr.
		2022	29 May	Amended to ply Fernvale Rd, Sengkang West Ave, Sengkang West Rd and Sengkang West Way, skipping a portion of Sengkang West Way.
				First bus brought forward to 0530 hrs daily.
	102Hougang Ctrl ↺ Seletar Aerospace Ave 102ASengkang East Way → Sengkang West Way	2023	27 March	102AIntroduced as a short-trip service from Sengkang East Way (Sengkang Stn) to Sengkang West Way (Opp Blk 461B) during evening peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
	102Hougang Ctrl ↺ Seletar Aerospace Ave 102ASengkang East Way → Sengkang West Way 102BSengkang West Way → Sengkang East Way		9 October	102BIntroduced as a short-trip service from Sengkang West Way (Blk 461B) to Sengkang East Way (Opp Sengkang Stn/Blk 260A) during morning peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

Service 102A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ Prince Edward	1971	11 April	Introduced between Serangoon Gdn Ter and Prince Edward Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to United Bus Company.
		1972	18 June	Amended to ply Bendemeer Rd towards Prince Edward Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Re-numbered Service 105 under 1974 Bus Rationalisation.

Service 103 (Current)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Serangoon Garden ↔ Commonwealth Ave	1971	11 April	Introduced between Serangoon Gdn Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
	Jln Kayu ↔ Commonwealth Ave	1974	3 February	Extended to Jln Kayu Ter under 1974 Bus Rationalisation.
			1 October	Serves new merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
			2 November	Amended to temporary bus terminal along Holland Dr with the partial closure of Commonwealth Ave Ter to facilitate the extension of Commonwealth Ave.
		1977	29 August	Amended back to Commonwealth Ave Ter via Nth Buona Vista Rd.
		1980	13 July	Amended to ply Commonwealth Ave with the conversion of Queens Circus to a signalised junction, skipping Queensway and Holland Rd.
	Jln Kayu ↔ Buona Vista	1982	27 May	Amended to Buona Vista Ter.
		1987	6 April	Skips removed bus stop before College Rd along Outram Rd.
			27 September	Amended to ply the extended Eu Tong Sen St towards Jln Kayu Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
		1989	29 January	Serves relocated bus stop opposite Sri Mariamman Tp along Sth Bridge Rd, skipping a removed bus stop opposite Jamae Mque.
	Jln Kayu ↔ New Bridge Rd	1992	29 March	Shortened to New Bridge Rd Ter under TransitLink Network Integration Exercise Phase 6.
		1995	17 December	Operations transferred to Trans Island Bus Services.
		1998	TBC	Skips a pair of temporarily closed bus stops before and after Seletar West Farmway 1 along Jln Kayu.
		1999	10 July	Skips the bus stop outside Plaza By The Pk along Bras Basah Rd.
(Current) Known as prior to 1 November 2001			26 December	Operations transferred to Singapore Bus Services.
		2001	15 July	Amended to ply Yio Chu Kang Lk and Boundary Rd.
		2002	TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
			31 December	Serves reinstated pair of bus stops before and after Sengkang West Ave along Jln Kayu.
		2003	TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	Serangoon ↺ Piccadilly		7 December	Shortened to start from Serangoon Int and loop at Piccadilly, and integrated with Service 378 under North East Line Rationalisation Phase 3.
		2007	1 July	Skips removed bus stop after East Camp Gate along Piccadilly.
	Serangoon ↺ West Camp Rd	2011	13 February	Integrated with Service 103M and extended to loop at West Camp Rd.
			3 September	Amended to Serangoon Integrated Transport Hub.
		2012	2 February	Serves new pair of bus stops before and after Rolls Royce Pte Ltd along Seletar Aerospace Dr.
		2013	13 October	Amended to ply Sengkang West Ave and Sengkang West Rd with the partial closure of Jln Kayu.
		2014	3 December	Designated wheelchair-accessible bus service (WAB).
	Serangoon ↔ Yishun	2015	14 June	Extended to Yishun Temp Int under the LTA's Bus Service Enhancement Programme (BSEP).
		2018	25 November	Serves 3 new bus stops before and opposite Blk 469B and opposite Yishun St 43 along Yishun Ave 1.
		2019	8 September	Amended to Yishun Integrated Transport Hub.
		2020	12 January	Serves new bus stop outside Blk 469B along Yishun Ave 1.
		2022	26 June	Serves new bus stop outside Blk 471A along Yishun Ave 1.
		2024	13 October	Serves new bus stop opposite Blk 470A along Yishun Ave 1.

Service 103A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Serangoon Garden ↔ Commonwealth Ave	1971	11 April	Introduced between Serangoon Gdn Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Re-numbered Service 106 under 1974 Bus Rationalisation.

Service 103W/103M (2003 - 2011)

Operator	Route	Year	Date	Service changes
	103WSerangoon ↺ West Camp Rd	2003	7 December	103WIntroduced between Serangoon Int and West Camp Rd (Loop) as Service 103W with the integration of Service 379 under North East Line Rationalisation Phase 3.
	103MSerangoon ↺ West Camp Rd	2008	28 January	103W 103MRe-numbered Service 103M.
		2011	13 February	103MIntegrated with Service 103 and discontinued with the partial closure of West Camp Rd and New West Camp Rd.

Service 104 (1971 - 1993)

Operator	Route	Year	Date	Service changes
United Bus Company	Serangoon Garden ↺ Upp Cross St	1971	23 April	Introduced between Serangoon Gdn Ter and Upp Cross St (Loop).
			5 July	Amended to ply Chartwell Dr, Burghley Dr, Berwick Dr and Serangoon Gdn Way towards Upp Cross St.
		1972	11 June	Amended to ply the extended Upp Cross St with the partial conversion of Havelock Rd to one-way traffic, skipping New Bridge Rd.
		1973	11 March	Amended to ply Hoot Kiam Rd towards Serangoon Gdn Ter with the conversion of Irwell Bank Rd to one-way traffic.
			1 July	Operations transferred to Singapore Bus Services.
		1977	31 October	Amended to skip Chartwell Dr, Burghley Dr and Berwick Dr with the introduction of Service 217.
		1983	6 February	Amended to ply CTE towards Serangoon Gdn Ter with the closure of temporary slip road between Braddell Rd and Lor Chuan.
			20 June	Amended back to ply Lor Chuan towards Serangoon Gdn Ter with the opening of new link road between Braddell Rd and Lor Chuan under Braddell Flyover.
		1986	28 September	Amended to ply Keng Lee Rd, Kg Java Rd and Bt Timah Rd, skipping Cavenagh Rd.
		1987	13 December	Serves new bus stop outside Newton Stn along Scotts Rd.
	Serangoon ↺ Upp Cross St	1988	13 March	Amended to Serangoon Int.
	Serangoon ↔ New Bridge Rd	1992	3 May	Extended to New Bridge Rd Ter and amended to ply Ang Mo Kio Ave 1 and Bishan Rd under TransitLink Network Integration Exercise Phase 7, skipping Lor Chuan.
		1993	5 December	Integrated with Service 134 to form Service 54 and discontinued under TransitLink Network Integration Exercise Phase 14.

Service 105

1st Generation (1974 - 1977)

Operator	Route	Year	Date	Service changes
	Serangoon Garden ↔ Prince Edward	1974	3 February	Re-numbered from Service 102A as a service between Serangoon Gdn Ter and Prince Edward Ter.
			8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
			14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1977	31 October	Discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Serangoon ↔ Clementi	1988	13 March	Introduced between Serangoon Int and Clementi Int, replacing Service 95.
		1991	1 April	First bus from Serangoon Int brought forward to 0545 hrs on weekdays and Saturdays.
	Serangoon ↔ Jurong East	1992	29 March	Extended to Jurong East Int under TransitLink Network Integration Exercise Phase 6.
			3 May	Integrated with Service 312 and amended to ply Serangoon Ave 2, Serangoon Ave 3 and Lor Chuan under TransitLink Network Integration Exercise Phase 7.
		1993	5 December	Amended to ply Queensway, Commonwealth Ave and Commonwealth Ave West under TransitLink Network Integration Exercise Phase 14, skipping Ulu Pandan Rd and Clementi Rd.
		1997	TBC	Serves new pair of bus stops outside Blk 286A and outside Blk 284 along Toh Guan Rd.
		1999	TBC	Skips temporarily closed bus stops outside and opposite Sch of Mechanical & Mfg along Commonwealth Ave West.
	105Serangoon ↔ Jurong East 105ASerangoon → Whitley Rd		TBC	105AIntroduced from Serangoon Int to Whitley Rd (Aft Tanglin CC) during morning peak hours on weekdays.
		2000	TBC	Last bus from Jurong East Int extended to 2400 hrs on Saturdays.
	105Serangoon ↔ Jurong East 105ASerangoon → Whitley Rd 105BJurong East → Commonwealth Ave West			105BIntroduced from Jurong East Int to Commonwealth Ave West (Clementi Stn) during morning peak hours on weekdays.
		2001	18 October	Serves reinstated bus stops outside Dover Stn along Commonwealth Ave West.
	105Serangoon ↔ Jurong East 105ASerangoon → Lor 2 Toa Payoh 105BJurong East → Commonwealth Ave West	2003	TBC	105AShortened to terminate at Lor 2 Toa Payoh (Toa Payoh Stn).
		2009	5 July	Amended to ply Boon Lay Way with the closure of Jurong East St 12 to facilitate the Jurong East Modification Project (JEMP).
		2011	3 September	Amended to Serangoon Integrated Transport Hub, skipping Boundary Rd with the route amendment of Service 109.
	105Serangoon ↔ Jurong East 105BJurong East → Commonwealth Ave West		TBC	105ADiscontinued.
			17 December	Amended to Jurong East Temp Int.
		2012	26 March	Designated wheelchair-accessible bus service (WAB).
		2020	6 December	Amended to relocated Jurong East Temp Int and serve new bus stop before Jurong East Stn along Jurong Gateway Rd.

Service 106 (Current)

Operator	Route	Year	Date	Service changes
	Serangoon Garden ↔ Commonwealth Ave	1974	3 February	Re-numbered from Service 103A as a service between Serangoon Gdn Ter and Commonwealth Ave Ter.
			1 October	Serves new merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1977	17 May	Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			31 October	Amended to skip Chartwell Dr, Burghley Dr and Berwick Dr with the introduction of Service 217.
			7 November	Amended to ply Penang Rd, Somerset Rd, Grange Rd, Orchard Rd/Orchard Blvd, Tanglin Rd, Napier Rd, Holland Rd and Holland Ave, skipping Bras Basah Rd, Nth Bridge Rd/Hill St, Sth Bridge Rd, Upp Circular Rd, New Bridge Rd, River Valley Rd, Delta Rd, Alexandra Rd, Tanglin Rd, Margaret Dr, Queensway and Commonwealth Dr.
	Serangoon Garden ↔ Buona Vista	1982	27 May	Amended to Buona Vista Ter.
		1983	6 February	Amended to ply CTE towards Serangoon Gdn Ter with the closure of temporary slip road between Braddell Rd and Lor Chuan.
			20 June	Amended back to ply Lor Chuan towards Serangoon Gdn Ter with the opening of new link road between Braddell Rd and Lor Chuan under Braddell Flyover.
	Serangoon Garden ↔ Bukit Batok	1985	28 October	Extended to Bt Batok Ter.
		1986	31 August	Serves additional bus stop outside Blk 9 along Holland Ave.
		1987	27 September	Amended to Bt Batok Int.
	Serangoon ↔ Bukit Batok	1988	13 March	Amended to Serangoon Int.
		1992	19 July	Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
		1999	TBC	Skips temporarily closed bus stops outside and opposite Sch of Mechanical & Mfg along Commonwealth Ave West.
Known as prior to 10 May 2004		2000	24 December	Operations transferred to Trans Island Bus Services.
	106Serangoon ↔ Bukit Batok 106ABukit Batok → Commonwealth Ave West	2001	18 October	Serves reinstated bus stops outside Dover Stn along Commonwealth Ave West.
			TBC	106AIntroduced from Bt Batok Int to Commonwealth Ave West (Opp SP T1A) during morning peak hours on weekdays.
		2002	7 July	Skips the bus stop opposite Mandarin Singapore along Orchard Rd.
			TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	Serangoon ↔ Bukit Batok		TBC	106ADiscontinued.
	Marina Ctr ↔ Bukit Batok		27 July	Shortened to Marina Ctr Ter under North East Line Rationalisation Phase 2.
		2005	2 July	Amended to ply Grange Rd with the partial closure of Somerset Rd.
	Shenton Way ↔ Bukit Batok	2010	26 April	Extended to Shenton Way Ter.
	106Shenton Way ↔ Bukit Batok 106ACentral Blvd ↺ Bayfront Ave		22 September	106AIntroduced between Central Blvd (Bef Marina Way) and Bayfront Ave (Loop), operating during the 2010 Formula 1 Singapore Grand Prix.
	Shenton Way ↔ Bukit Batok		28 September	106ADiscontinued.
	106Shenton Way ↔ Bukit Batok 106ACentral Blvd ↺ Bayfront Ave	2011	21 September	106ARe-introduced between Central Blvd (Bef Marina Way) and Bayfront Ave (Loop), operating during the 2011 Formula 1 Singapore Grand Prix.
	Shenton Way ↔ Bukit Batok		27 September	106ADiscontinued.
	106Shenton Way ↔ Bukit Batok 106ABukit Batok → Commonwealth Ave West	2012	17 September	106AIntroduced from Bt Batok Int to Commonwealth Ave West (Clementi Stn) during morning peak hours on weekdays.
		2013	1 December	Serves new bus stop outside Downtown Stn along Central Blvd.
		2014	28 September	Amended to ply Robinson Rd and Marina Blvd towards Bt Batok Int, skipping Maxwell Rd and Central Blvd with the road changes in the Marina Sth area.
		2015	14 June	Designated wheelchair-accessible bus service (WAB).
(Current)		2016	29 May	Operations transferred to Tower Transit Singapore.
		2017	25 June	Amended to the relocated Shenton Way Ter.

Service 107 (Current)

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Serangoon Garden ↺ Shenton Way	1978	23 January	Introduced between Serangoon Gdn Ter and Shenton Way (Loop) as a semi-express service on weekdays and Saturdays, replacing Blue Arrow Service 304.
		1979	11 February	Amended to ply the extended Shenton Way, Keppel Rd and Anson Rd, skipping Parsi Rd.
		1981	10 May	Skips bus stop before Braddell Flyover along Braddell Rd.
			11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
		1983	6 February	Amended to ply CTE towards Serangoon Gdn Ter with the closure of temporary slip road between Braddell Rd and Lor Chuan.
			20 June	Amended back to ply Lor Chuan towards Serangoon Gdn Ter with the opening of new link road between Braddell Rd and Lor Chuan under Braddell Flyover.
		1988	3 January	Serves new staggered bus stop opposite Treasury Bldg along Shenton Way, skipping the bus stop opposite Marina Hse.
	Serangoon ↺ Shenton Way		13 March	Amended to Serangoon Int, converted to full day trunk service and amended to ply Kallang Bahru and Marina Ctr.
		1989	11 June	Amended to skip Marina Ctr.
		1994	3 July	Amended to ply Kallang Rd, Victoria St and Jln Sultan towards Shenton Way, skipping Crawford St.
		1997	23 March	Converted to day service with the introduction of Service 107X.
	107Serangoon ↺ Shenton Way 107ASerangoon → Shenton Way	2000	TBC	107AIntroduced from Serangoon Int to Shenton Way (Opp Temasek Twr) during morning peak hours on weekdays.
		2001	TBC	Last bus revised to 1330 hrs on Saturdays.
		2002	TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	4 May	Amended to ply Geylang Bahru, Bendemeer Rd, Whampoa East and Serangoon Rd, skipping Jln Kolam Ayer.
			TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	Hougang Ctrl ↔ Shenton Way		30 November	Extended to Hougang Ctrl Int and amended to Shenton Way Ter under North East Line Rationalisation Phase 3, replacing the deleted sectors of Service 97.
				107ADiscontinued with the amendment of Service 107 to Shenton Way Ter under North East Line Rationalisation Phase 3.
		2007	28 April	Serves additional bus stop outside Victoria Concert Hall along Fullerton Rd.
		2009	27 December	Serves the bus stop opposite Singapore Cricket Club along Connaught Dr with the abolition of the bus stop outside Esplanade Pk.
		2015	3 December	Designated wheelchair-accessible bus service (WAB).
		2016	1 May	Amended to ply Esplanade Dr with the partial closure of Fullerton Rd.
		2017	25 June	Amended to the relocated Shenton Way Ter.
		2021	7 February	Amended to ply Bidadari Pk Dr, skipping a portion of Upp Serangoon Rd.
			26 December	Amended to ply Esplanade Dr towards Shenton Way Ter with the closure of Connaught Dr.
		2022	28 August	Temporarily amended to ply Hougang Ctrl and Hougang Ave 4 with the partial closure of Hougang Ctrl to facilitate the construction of CR8 NE14 Hougang on the Cross Island Line.

Service 107X/107M (Current)

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	107XSerangoon ↺ Raffles Blvd	1997	23 March	107XIntroduced between Serangoon Int and Raffles Blvd (Loop) as an alternate route of Service 107, operating during off peak periods on weekdays and Saturdays and throughout the day on Sundays and Public Holidays, numbered as Service 107X.
		2001	TBC	First bus brought forward to 1340 hrs on Saturdays.
		2002	TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	4 May	Amended to ply Geylang Bahru, Bendemeer Rd, Whampoa East and Serangoon Rd, skipping Jln Kolam Ayer.
			TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	107XHougang Ctrl ↺ Raffles Blvd		30 November	Extended to Hougang Ctrl Int under North East Line Rationalisation Phase 3, replacing the deleted sectors of Service 97.
	107MHougang Ctrl ↺ Raffles Blvd	2008	28 January	107X 107MRe-numbered Service 107M.
		2015	3 December	Designated wheelchair-accessible bus service (WAB).
		2021	7 February	Amended to ply Bidadari Pk Dr, skipping a portion of Upp Serangoon Rd.
		2022	28 August	Temporarily amended to ply Hougang Ctrl and Hougang Ave 4 with the partial closure of Hougang Ctrl to facilitate the construction of CR8 NE14 Hougang on the Cross Island Line.

Service 109 / Short-Trip 109A

Operator	Route	Year	Date	Service changes
(Current)	Serangoon ↔ Changi Village	2006	28 May	Introduced between Serangoon Int and Changi Village Ter, operating between 0600 hrs and 2330 hrs from Serangoon Int and Changi Village Ter daily.
			TBC	First bus from Serangoon Int brought forward to 0545 hrs on weekdays.
		2011	3 September	Amended to Serangoon Integrated Transport Hub and amended to ply Boundary Rd with the route amendment of Service 105.
			26 September	Designated wheelchair-accessible bus service (WAB).
		2012	29 April	Serves new bus stop outside Blk 612 along Pasir Ris Dr 1.
	109Serangoon ↔ Changi Village 109ASerangoon → Hougang Ave 4	2014	26 May	109AIntroduced from Serangoon Int to Hougang Ave 4 (Blk 913) during evening peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
			5 October	Serves additional pair of bus stops before and after Punggol Rd along TPE.
		2016	13 November	Serves new pair of bus stops opposite Blk 293D and outside Blk 286B along Sengkang East Rd.
		2022	30 October	Temporarily amended to ply Pasir Ris St 11 and Pasir Ris St 12 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of CR4 Pasir Ris East station on the Cross Island Line.
		2023	26 February	Temporarily amended to ply the bus-only corridor along Loyang Ave and Loyang Way with the partial closure of Loyang Ave to facilitate the construction of Loyang Viaduct and CR3 Loyang on the Cross Island Line, skipping 3 pairs of bus stops along Loyang Ave.
			8 October	Temporarily amended to ply Pasir Ris Ctrl and Pasir Ris Dr 8 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of CR5 CP1 EW1 Pasir Ris station on the Cross Island Line.

Service 110

1st Generation (1971 - 1977)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Upp Serangoon Rd (10.5 km) ↔ Prince Edward	1971	11 April	Introduced between Upp Serangoon Rd 10.5 km Ter and Prince Edward Ter under 1971 Bus Reorganisation.
			9 May	Amended to ply Mountbatten Rd, Kallang Rd, Crawford St, Nth Bridge Rd and Bras Basah Rd, skipping Nicoll Highway.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1975	2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Upp Serangoon Rd 10.5 km Ter with the conversion of Geylang Rd to one-way traffic.
			21 July	Amended to ply St. Andrew's Rd and Stamford Rd, skipping Coleman St and Hill St.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
			14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1977	16 May	Integrated with Service 70 and discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	Compassvale ↺ Changi Airport	2017	22 October	Introduced between Compassvale Int and Changi Airport PTB 2 (Loop), operating between 0530 hrs and 2345 hrs daily. Wheelchair-accessible bus service (WAB) at launch.
	Buangkok ↺ Changi Airport	2024	1 December	Extended to Buangkok Integrated Transport Hub.

Service 111 (Current)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Upp Serangoon Rd (10.5 km) ↔ Commonwealth Ave	1971	11 April	Introduced between Upp Serangoon Rd 10.5 km Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	24 February	Amended to ply Grange Rd, Orchard Blvd and Paterson Rd towards Commonwealth Ave Ter with the conversion of Orchard Rd to one-way traffic.
			1 October	Serves new bus stop outside Nan Hwa Girls' High Sch along Bencoolen St.
				Serves merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1977	17 May	Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			19 June	Amended to ply Orchard Blvd and Grange Rd towards Commonwealth Ave Ter with the full conversion of Orchard Rd to one-way traffic.
			29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
	Upp Serangoon Rd (10.5 km) ↔ Buona Vista	1982	27 May	Amended to Buona Vista Ter.
	Hougang South ↔ Buona Vista	1983	30 October	Amended to Hougang Int.
	Hougang South ↔ Ghim Moh	1989	5 November	Extended to Ghim Moh Ter.
		1992	19 July	Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
	Hougang Ctrl ↔ Ghim Moh	1994	18 December	Extended to Hougang Ctrl Int.
	Hougang Ctrl Temp Int ↔ Ghim Moh	1998	24 May	Amended to Hougang Ctrl Temp Int.
		2000	4 June	Serves new pair of bus stops outside and opposite British High Comm along Tanglin Rd.
	Hougang Ctrl ↔ Ghim Moh	2001	20 May	Amended back to Hougang Ctrl Int.
		2002	7 July	Skips the bus stop opposite Mandarin Singapore along Orchard Rd.
			TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	Ghim Moh ↺ Temasek Ave		27 July	Shortened to loop at Temasek Ave from Ghim Moh Ter under North East Line Rationalisation Phase 2.
		2005	2 July	Amended to ply Grange Rd with the partial closure of Somerset Rd.
		2012	3 December	Designated wheelchair-accessible bus service (WAB).
		2014	27 April	Serves new bus stop outside Queens Condo along Commonwealth Ave.
		2023	10 September	Extended to terminate at Ghim Moh Rd (Blk 7) towards Ghim Moh Ter.

Service 112

1st Generation (1971 - 1985)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Upp Serangoon Rd (10.5 km) ↔ Commonwealth Ave	1971	11 April	Introduced between Upp Serangoon Rd 10.5 km Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to United Bus Company.
		1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	11 March	Amended to ply Zion Rd and Hoot Kiam Rd towards Commonwealth Ave Ter with the partial conversion of Kim Seng Rd and Irwell Bank Rd to one-way traffic.
			1 July	Operations transferred to Singapore Bus Services.
		1974	1 October	Serves merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1975	2 February	Amended to ply Tiong Bahru Rd and the extended Zion Rd towards Commonwealth Ave Ter with the partial conversion of Kim Seng Rd and Outram Rd to one-way traffic.
			2 November	Amended to temporary bus terminal along Holland Dr with the partial closure of Commonwealth Ave Ter to facilitate the extension of Commonwealth Ave.
		1977	29 August	Amended back to Commonwealth Ave Ter via Nth Buona Vista Rd.
		1979	11 February	Amended to ply the extended Shenton Way towards Commonwealth Ave Ter, skipping Parsi Rd and Anson Rd.
		1980	20 January	Amended to ply Spottiswoode Pk Rd with the partial conversion of Cantonment Rd to one-way traffic.
	Commonwealth Ave ↺ Finlayson Green	1981	11 January	Shortened to loop at Finlayson Green from Commonwealth Ave Ter and amended to ply Cecil St and Shenton Way.
	Commonwealth Ave ↺ Empress Pl		21 September	Extended to loop at Empress Pl.
	Buona Vista ↺ Empress Pl	1982	27 May	Amended to Buona Vista Ter.
		1984	10 June	Converted to peak hour service on weekdays and Saturdays.
		1985	24 November	Discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	112Hougang Central ↺ Hougang St 92 112AHougang Central → Upp Serangoon Rd	2004	15 February	Introduced between Hougang Ctrl Int and Hougang St 92 (Loop) with the integration of Services 322 and 327.
				112AIntroduced from Hougang Ctrl Int to Upp Serangoon Rd (Kovan Stn), operating after the last bus of Service 112 daily.
		2013	9 June	Designated wheelchair-accessible bus service (WAB).
	112Hougang Central ↺ Hougang St 92 112AHougang Central → Upp Serangoon Rd 112BHougang Central → Hougang Ave 7	2025	24 March	112BIntroduced from Hougang Ctrl Int to Hougang Ave 7 (Opp Blk 321) during evening peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

Service 113 (Current)

Operator	Route	Year	Date	Service changes
(Current)	Hougang Ctrl ↺ Upp Paya Lebar Rd	2004	15 February	Introduced between Hougang Ctrl Int and Upp Paya Lebar Rd (Loop) with the integration of Services 321 and 326.
	113Hougang Ctrl ↺ Upp Paya Lebar Rd 113A AMUpp Paya Lebar Rd → Upp Serangoon Rd PMUpp Serangoon Rd ↺ Upp Paya Lebar Rd	2005	27 June	113AIntroduced from Upp Paya Lebar Rd (Blk 161) to Upp Serangoon Rd (Kovan Stn) during morning peak hours and between Upp Serangoon Rd (Kovan Stn) and Upp Paya Lebar Rd (Loop) during evening peak hours on weekdays.
		2010	28 February	Designated wheelchair-accessible bus service (WAB).
	113Hougang Ctrl ↺ Upp Paya Lebar Rd 113AUpp Serangoon Rd ↺ Upp Paya Lebar Rd	2018	13 August	113AMorning peak route extended to start from Upp Serangoon Rd (Kovan Stn Exit C).

Service 114 (Current)

Operator	Route	Year	Date	Service changes
(Current)	Sengkang Ctrl ↺ Buangkok Cres	2020	25 October	Introduced between Sengkang Ctrl (Buangkok Stn Exit B) and Buangkok Cres (Loop), operating between 0600 hrs and 0035 hrs daily. Wheelchair-accessible bus service (WAB) at launch.
	114Sengkang Ctrl ↺ Buangkok Cres 114ASengkang Ctrl → Buangkok Cres	2021	31 December	114AIntroduced from Sengkang Ctrl (Buangkok Stn Exit B) to Buangkok Cres (Blk 998B), operating after the last bus of Service 114 on eves of major public holidays. Wheelchair-accessible bus service (WAB) at launch.
		2022	13 March	Serves new bus stop opposite Blk 991A along Buangkok Cres.
	114Buangkok ↺ Buangkok Cres 114ABuangkok → Buangkok Cres	2024	1 December	Extended to start from Buangkok Integrated Transport Hub.

Service 115 (Current)

Operator	Route	Year	Date	Service changes
(Current)	Hougang St 21 ↺ Hougang Ave 3	2004	30 October	Introduced between Hougang St 21 (Hougang St 21 FC) and Hougang Ave 3 (Loop), operating between 0715 hrs and 1815 hrs daily.
		2014	3 December	Designated wheelchair-accessible bus service (WAB).
		2021	3 May	Last bus extended to 2000 hrs daily.

Service 116

1st Generation (April - August 2006)

Operator	Route	Year	Date	Service changes
	Hougang Ctrl ↺ Buangkok View	2006	3 April	Introduced between Hougang Ctrl Int and Buangkok View (Buangkok Green Med Pk) (Loop) for a trial period of 3 months, operating between 0630 hrs and 1730 hrs daily.
			10 July	Revised to operate on weekdays only.
			15 August	Discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	Hougang Ctrl ↺ Serangoon Ctrl	2012	18 November	Introduced between Hougang Ctrl Int and Serangoon Ctrl (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 2330 hrs daily.
		2013	31 March	Designated wheelchair-accessible bus service (WAB).
	116Hougang Ctrl ↺ Serangoon Ctrl 116ASerangoon North Ave 4 → Serangoon Ctrl	2019	15 April	116AIntroduced from Serangoon Nth Ave 4 (Blk 504A CP) to Serangoon Ctrl (Serangoon Stn Exit C/Blk 201) during morning peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

Service 117 (Current)

Operator	Route	Year	Date	Service changes
(Current)	Punggol ↔ Sembawang	2015	20 December	Introduced between Punggol Temp Int and Sembawang Int under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 2330 hrs daily from Punggol Temp Int and Sembawang Int. Wheelchair-accessible bus service (WAB) at launch.
		2016	24 April	Amended to ply West Camp Rd.
		2017	26 November	Serves additional bus stop outside Punggol Stn/Int along Punggol Ctrl.
		2018	27 May	Serves new pair of bus stops outside and opposite The Visionaire along Canberra Lk.
			25 November	Serves 3 new bus stops before and opposite Blk 469B and opposite Yishun St 43 along Yishun Ave 1.
	117Punggol ↔ Sembawang 117AYishun Ave 1 → Yishun Ave 2 117BSembawang Int → Yishun Ave 2	2019	14 January	117AIntroduced from Yishun Ave 1 (Opp Blk 430B) to Yishun Ave 2 (Bef Khatib Stn) during morning peak hours on weekdays.
			11 March	117BIntroduced from Sembawang Int to Yishun Ave 2 (Opp Yishun Stn) during morning peak hours on weekdays.
			2 November	Serves new pair of bus stops outside and opposite Canberra Stn along Canberra Lk.
		2020	12 January	Serves a new bus stop outside Blk 469B along Yishun Ave 1.
	117Punggol ↔ Sembawang 117AYishun Ave 1 → Yishun Ave 2		30 March	117BDiscontinued.
	117Punggol ↔ Sembawang 117AYishun Ave 1 → Yishun Ave 2	2021	28 November	117Amended to ply Sembawang Rd, Canberra St, Canberra Wk and Canberra Cres, skipping a portion of Canberra Lk.
				117First bus brought forward to 0530 hrs from Punggol Temp Int and Sembawang Int on Weekends and Public Holidays.
	117 117MPunggol ↔ Sembawang 117AYishun Ave 1 → Yishun Ave 2		29 November	117MIntroduced as a supplementary service between Punggol Temp Int and Sembawang Int during weekday morning and evening peak hours, plying an extended route of Service 117 via Seletar Aerospace Lk and Seletar Aerospace Cres. Wheelchair-accessible bus service (WAB) at launch.
				117MFirst bus brought forward to 0530 hrs from Punggol Temp Int and Sembawang Int on weekdays.
		2022	26 June	Serves new bus stop outside Blk 471A along Yishun Ave 1.
			31 July	Amended to ply Punggol Field, skipping Punggol Ctrl and a portion of Punggol Way.
		2023	27 November	117AExtended to start from Yishun Ave 1 (Opp Blks 469A/469B).
		2024	13 October	Serves new bus stop opposite Blk 470A along Yishun Ave 1.

Service 118

1st Generation (1988 - 1990)

Operator	Route	Year	Date	Service changes
	Hougang ↺ Tomlinson Rd	1988	24 January	Introduced between Hougang Int and Tomlinson Rd (Loop).
		1990	16 December	Integrated with Service 111 and discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
	Punggol ↔ Changi Business Pk	2015	20 December	Introduced between Punggol Temp Int and Changi Business Pk Ter under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 2330 hrs daily from Punggol Temp Int and Changi Business Pk Ter. Wheelchair-accessible bus service (WAB) at launch.
(Current)		2016	4 September	Operations transferred to Go-Ahead Singapore.
			23 October	Serves new pair of bus stops outside UWCSEA and outside Blk 871C along Tampines Ave 5.
	118Punggol ↔ Changi Business Pk 118ATPE → Simei Ave 118BSimei Ave → TPE	2017	10 April	118AIntroduced from TPE (Aft Punggol Rd) to Simei Ave (ITE Coll East Adm Blk) during morning peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
				118BIntroduced from Simei Ave (Opp ITE Coll East Adm Blk) to TPE (Bef Punggol Rd) during evening peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
			21 October	Amended to ply Changi Sth Ave 1 and Changi Business Pk Ave 1, skipping Changi Sth Ave 2.
			26 November	Serves additional bus stop outside Punggol Stn/Int along Punggol Ctrl.
	118Punggol ↔ Changi Business Pk 118APunggol → Simei Ave 118BSimei Ave → TPE	2023	30 October	118AExtended to start from Punggol Temp Int.

Service 119 (Current)

Operator	Route	Year	Date	Service changes
	Sengkang ↺ Hougang St 21	2003	14 September	Introduced between Sengkang Int and Hougang St 21 (Loop).
		2004	15 February	Serves 2 new bus stops outside Hougang St 21 FC and between Blks 210/211 along Hougang St 21.
	Punggol ↺ Hougang St 21	2012	21 October	Extended to Punggol Temp Int under the LTA's Bus Service Enhancement Programme (BSEP).
		2013	31 March	Designated wheelchair-accessible bus service (WAB).
		2014	13 January	First bus brought forward to 0500 hrs on weekdays.
		2015	30 August	Serves new pair of bus stops outside Twin Waterfalls and after TPE along Punggol Way.
(Current)		2016	4 September	Operations transferred to Go-Ahead Singapore.
				First bus brought forward to 0505 hrs on Saturdays and 0550 hrs on Sundays & Public Holidays.
			13 November	Serves new pair of bus stops opposite Blk 293D and outside Blk 286B along Sengkang East Rd.

Service 120 (April - May 1971)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Jln Aman ↔ Prince Edward	1971	11 April	Introduced between Jln Aman Ter and Prince Edward Ter under 1971 Bus Reorganisation.
			9 May	Integrated with Service 120A, amended to ply Stamford Rd, Waterloo St and Bras Basah Rd and re-numbered Service 120/120A.

2nd Generation (1974 - 1989)

Operator	Route	Year	Date	Service changes
	St. Michael's ↔ Prince Edward	1974	3 February	Re-numbered from Service 120/120A as a service between Jln Aman Ter and Prince Edward Ter under 1974 Bus Rationalisation.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1976	14 March	Serves new staggred bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1979	11 February	Amended to ply the extended Shenton Way, Palmer Rd and Anson Rd, skipping Parsi Rd.
	St. Michael's ↺ Beach Rd	1981	23 August	Shortened to loop at Beach Rd from Jln Aman Ter.
		1983	2 January	Amended to Whampoa Rd Ter and amended to ply Whampoa Rd, Whampoa Dr, Jln Bahagia and Kim Keat Rd when exiting St. Michael's Est.
				Amended to ply Whampoa Dr when entering St. Michael's Est, skipping Moulmein Green and Jln Kebun Limau.
		1989	TBC	Discontinued.

3rd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	New Bridge Rd ↺ Telok Blangah Hts	2013	21 April	Introduced between New Bridge Rd Ter and Telok Blangah Hts (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily.
			9 June	Designated wheelchair-accessible bus service (WAB).
		2017	26 November	Skips removed bus stop before Hosp Dr along Kg Bahru Rd.
			10 December	Serves new bus stop opposite Blk 91A along Telok Blangah St 31.
	Kampong Bahru ↺ Telok Blangah Hts	2018	10 March	Shortened to Kg Bahru Ter with the closure of New Bridge Rd Ter.
				First bus brought forward to 0555 hrs daily.
		2024	15 September	Serves new bus stop along Alexandra Rd opposite Cycle & Carriage.

Service 120/120A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Jln Aman ↔ Prince Edward	1971	9 May	Re-numbered from Service 120 between Jln Aman Ter and Prince Edward Ter.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Amended to skip Stamford Rd, Waterloo St and Bras Basah Rd and re-numbered Service 120 under 1974 Bus Rationalisation.

Service 120A (April - May 1971)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Jln Aman ↔ Prince Edward	1971	11 April	Introduced between Jln Aman Ter and Stamford Rd (Loop).
			9 May	Integrated with Service 120 and discontinued.

Service 121 (1971 - 1974)

Operator	Year	Date	Service changes
STC	1971	11 April	Introduced between Jln Aman Ter and Prince Edward Ter under 1971 Bus Reorganisation.
ABC		6 December	Operations transferred to ABC.
	1974	3 February	Discontinued under 1974 Bus Rationalisation.

Service 121 (since 2014)

Operator	Route	Year	Date	Service changes
(Current)	New Bridge Rd ↺ Telok Blangah Rise	2014	16 March	Introduced between New Bridge Rd Ter and Telok Blangah Cres (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily.
			29 June	Designated wheelchair-accessible bus service (WAB).
	Kampong Bahru ↺ Telok Blangah Rise	2018	10 March	Extended to Kg Bahru Ter with the closure of New Bridge Rd Ter.
				First bus brought forward to 0555 hrs daily.
	Shenton Way ↺ Telok Blangah Rise	2023	17 December	Extended to start from Shenton Way Ter under Thomson–East Coast Line Bus Rationalisation.
				First bus brought forward to 0550 hrs daily.
		2025	30 March	Serves new bus stop opposite Police Cantonment Cplx along Cantonment Rd.

Service 122 (1971 - 1993)

Operator	Route	Year	Date	Service changes
ABC	St. Michael's ↔ Commonwealth Ave (1971 - 1982)	1971	11 April	Introduced between Jln Aman Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		1977	17 May	Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
	St. Michael's ↔ Buona Vista (1982 - 1985)	1982	27 May	Amended to Buona Vista Ter.
		1983	2 January	Amended to Whampoa Rd Ter and amended to ply Whampoa Rd, Whampoa Dr, Jln Bahagia and Kim Keat Rd when exiting St. Michael's Est.
				Amended to ply Whampoa Dr when entering St. Michael's Est, skipping Moulmein Green and Jln Kebun Limau.
	St. Michael's ↔ Bukit Batok (1985 - 1991)	1985	6 January	Extended to Bt Batok Ter.
		1987	19 April	Serves new staggered bus stop under the PIE Flyover along Jln Anak Bt, skipping the bus stop opposite Bt Timah Plaza.
				Amended to use new access road from Upp Bt Timah Rd to Jln Anak Bt, skipping BKE.
			14 June	Amended to ply Victoria St, Kallang Rd and Lavender St, skipping Arab St, Rochor Canal Rd, Kitchener Rd and Tyrwhitt Rd.
			27 September	Amended to Bt Batok Int.
				Amended to ply Sth Bridge Rd and Eu Tong Sen St, skipping Upp Circular Rd.
			13 December	Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
		1990	10 June	Amended to ply Nth Boat Quay, skipping Sth Bridge Rd, Nth Canal Rd and Eu Tong Sen St.
	St. Michael's ↔ Buona Vista (1991 - 1993)	1991	28 April	Shortened to Buona Vista Ter under TransitLink Network Integration Exercise Phase 4.
		1993	4 April	Discontinued under TransitLink Network Integration Exercise Phase 12.

Service 122 (since 2015)

Operator	Route	Year	Date	Service changes
(Current)	New Bridge Rd ↺ Commonwealth Dr	2015	15 March	Introduced between New Bridge Rd Ter and Commonwealth Dr (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily.
			22 June	Designated wheelchair-accessible bus service (WAB).
	Kampong Bahru ↺ Commonwealth Dr	2018	10 March	Extended to Kg Bahru Ter with the closure of New Bridge Rd Ter.
				First bus brought forward to 0555 hrs daily.
		2021	22 August	Serves merged bus stop outside Blk 30 along Margaret Dr, skipping the bus stop opposite Queenstown Lib and outside The Fisherman Ch.

Service 123 / Short-Trip 123A (2005 - 2014) / Short-Trip 123B (2005 - 2008)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	St. Michael's ↔ South Canal	1971	11 April	Introduced between Jln Aman Ter and Sth Canal Ter under 1971 Bus Reorganisation.
	St. Michael's ↔ Kg Bahru Rd		9 May	Amended to Kg Bahru Rd Ter.
United Bus Company			6 December	Operations transferred to United Bus Company.
(Current) Known as prior to 1 November 2001
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	24 February	Amended to ply Grange Rd, Orchard Blvd and Paterson Rd towards Jln Aman Ter with the conversion of Orchard Rd to one-way traffic.
		1975	2 February	Amended to ply Zion Rd and Ganges Ave towards Jln Aman Ter with the partial conversion of Outram Rd to one-way traffic.
	St. Michael's ↺ New Bridge Rd	1976	8 August	Amended to loop at New Bridge Rd from Jln Aman Ter.
		1978	TBC	Amended to ply Moulmein Rd, skipping Norfolk Rd.
		1983	2 January	Amended to Whampoa Rd Ter and amended to ply Whampoa Rd, Whampoa Dr, Jln Bahagia and Kim Keat Rd when exiting St. Michael's Est.
		1984	27 May	Amended to ply Whampoa Dr when entering St. Michael's Est with the closure of Jln Kebun Limau to facilitate the construction of the Central Expressway (CTE).
		1987	6 April	Skips removed bus stop before College Rd along Outram Rd.
			1 November	Amended to ply Eu Tong Sen St towards St. Michael's Ter to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop outside Orchard Stn along Orchard Blvd, skipping the bus stop opposite Orchard Stn.
				Serves new bus stop outside Newton Stn along Scotts Rd.
		1992	19 July	Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
			TBC	Amended to ply Clemenceau Ave towards St. Michael's Ter, skipping Tank Rd.
	New Bridge Rd ↺ Tomlinson Rd	1993	4 April	Shortened to loop at Tomlinson Rd from New Bridge Rd Ter under TransitLink Network Integration Exercise Phase 12.
	Bukit Merah ↺ Bt Purmei Ave		23 May	Integrated with Service 14, extended to start from Bt Merah Int and amended to loop at Bt Purmei Ave under TransitLink Network Integration Exercise Phase 13.
		1999	TBC	First bus brought forward to 0545 hrs on weekdays and Saturdays.
		2002	7 July	Skips the bus stop opposite Mandarin Singapore along Orchard Rd.
	123Bukit Merah ↺ Bt Purmei Ave 123ABt Purmei Ave → Tiong Bahru Rd 123BTiong Bahru Rd → Bt Purmei Ave	2005	2 July	Amended to ply Grange Rd with the partial closure of Somerset Rd.
			30 October	Serves new bus stop outside Blk 94 along Zion Rd.
			TBC	123AIntroduced from Bt Purmei Ave (Opp Blk 109) to Tiong Bahru Rd (Tiong Bahru Plaza) during morning peak hours on weekdays.
				123BIntroduced as a short-trip service from Tiong Bahru Rd (Opp Tiong Bahru Plaza) to Bt Purmei Ave (Blk 109) during evening peak hours on weekdays.
	123Bukit Merah ↺ Bt Purmei Ave 123ABt Purmei Ave → Tiong Bahru Rd 123BTiong Bahru Rd ↺ Bt Purmei Ave → Tiong Bahru Rd	2007	15 January	123BExtended to terminate at Tiong Bahru Rd (Opp Tiong Bahru Plaza) and converted to loop service.
	123Bukit Merah ↺ Bt Purmei Ave 123ABt Purmei Ave → Tiong Bahru Rd	2008	28 January	123BRe-numbered Service 123M.
			14 July	Designated wheelchair-accessible bus service (WAB).
	Bukit Merah ↔ HarbourFront	2014	24 August	123Extended to HarbourFront Int.
				123ADiscontinued with the conversion of Service 123M to a full day service.
	Bukit Merah ↔ Sentosa Beach Stn	2017	30 July	Extended to Sentosa’s Beach Station Ter, skipping Telok Blangah Rd and HarbourFront Int.

Service 123M

Operator	Route	Year	Date	Service changes
(Current)	Tiong Bahru Stn ↺ Bt Purmei Ave	2008	28 January	Converted from Short-Trip 123B as a route variant of Service 123 between Tiong Bahru Rd (Opp Tiong Bahru Plaza) and Bt Purmei Ave (Loop) during evening peak hours on weekdays.
			14 July	Designated wheelchair-accessible bus service (WAB).
	HarbourFront ↺ Tiong Bahru Rd	2014	24 August	Converted to a full day service, extended to start from HarbourFront Int and amended to loop at Tiong Bahru Rd under the LTA's Bus Service Enhancement Programme (BSEP).

Service 124

Operator	Route	Year	Date	Service changes
Singapore Traction Company	St. Michael's ↔ Kg Bahru Rd	1971	11 April	Introduced between Jln Aman Ter and Kg Bahru Rd Ter under 1971 Bus Reorganisation.
Amalgamated Bus Company			6 December	Operations transferred to Amalgamated Bus Company.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	24 February	Amended to ply Grange Rd, Orchard Blvd and Paterson Rd towards Jln Aman Ter with the conversion of Orchard Rd to one-way traffic.
	St. Michael's ↺ Telok Blangah Rise	1976	18 July	Extended to loop at Telok Blangah Rise from Jln Aman Ter.
		1983	2 January	Amended to Whampoa Rd Ter and amended to ply Whampoa Rd, Whampoa Dr, Jln Bahagia and Kim Keat Rd when exiting St. Michael's Est.
		1984	27 May	Amended to ply Whampoa Dr when entering St. Michael's Est with the closure of Jln Kebun Limau to facilitate the construction of the Central Expressway (CTE).
		1986	16 November	Serves new staggered bus stop outside Thong Teck Bldg along Scotts Rd, skipping the bus stop outside Metro Orchard.
		1987	27 September	Amended to ply the extended Eu Tong Sen St towards St. Michael's Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards St. Michael's Ter to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop outside Orchard Stn along Orchard Blvd, skipping the bus stop opposite Orchard Stn.
		1988	20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1992	19 July	Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
	St. Michael's ↔ Bukit Merah	1993	4 April	Amended to ply Balestier Rd, Moulmein Rd, Newton Rd and Scotts Rd and extended to Bt Merah Int under TransitLink Network Integration Exercise Phase 12.
		1994	TBC	Serves additional bus stop outside Balestier Twrs along Balestier Rd.
		1995	7 May	Amended to ply Orchard Turn.
		1997	7 December	Amended to ply Sth Bridge Rd, Neil Rd and Cantonment Rd with the partial closure of New Bridge Rd to facilitate the construction of Chinatown MRT station on the North East MRT Line.
		2002	20 April	Amended to ply Upp Cross St and the reinstated New Bridge Rd, skipping Sth Bridge Rd, Neil Rd and Cantonment Rd.
			7 July	Skips the bus stop outside Orchard Emerald along Orchard Rd.
	124St. Michael's ↺ Telok Blangah Dr 124ASt. Michael's → Telok Blangah Dr	2003	23 November	Amended to loop at Telok Blangah Dr from St. Michael's Ter.
				124AIntroduced from St. Michael's Ter to Telok Blangah Dr (Blk 50), operating after the last bus of Service 124 daily.
		2005	2 July	Amended to ply Grange Rd and Orchard Lk with the partial closure of Somerset Rd.
			9 October	Serves additional bus stop outside Clarke Quay Stn along Eu Tong Sen St.
		2006	29 October	Serves relocated bus stop outside Orchard Stn along Orchard Turn.
		2012	25 June	Designated wheelchair-accessible bus service (WAB).
	St. Michael's ↔ HarbourFront	2013	21 April	Extended to HarbourFront Int and amended to ply Telok Blangah Hts, Telok Blangah St 31 and Telok Blangah Dr, skipping Telok Blangah St 32.
				124ADiscontinued with the route extension of Service 124 to HarbourFront Int.
			29 December	Serves new bus stop outside Outram Pk Stn along New Bridge Rd.
		2017	26 November	Serves bus stop after Hosp Dr along Eu Tong Sen St with the removal of the bus stop before Hosp Dr along Kg Bahru Rd.
			10 December	Serves new pair of bus stops outside Blk 92B and opposite Blk 91A along Telok Blangah St 31.
		2023	8 January	Skips the bus stop outside Newton Stn Exit B along Scotts Rd temporarily to facilitate upgrading works.
			27 August	Serves reinstated bus stop outside Newton Stn Exit B along Scotts Rd.

Service 125 / Short-Trip 125A (2001 - 2005) / Short-Trip 125A (since 2010)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	St. Michael's ↔ Labrador	1971	11 April	Introduced between Jln Aman Ter and Labrador Ter under 1971 Bus Reorganisation.
	St. Michael's ↔ Delta Circus		2 May	Extended to Delta Circus Ter.
United Bus Company			6 December	Operations transferred to United Bus Company.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
	St. Michael's ↔ Jln Bt Merah	1974	3 February	Amended to Jln Bt Merah Ter under 1974 Bus Rationalisation.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
	St. Michael's ↔ Telok Blangah Way	1975	21 July	Amended to Telok Blangah Way Ter.
				Amended to ply St. Andrew's Rd and Stamford Rd, skipping Coleman St and Hill St.
			14 December	Amended to ply Kg Java Rd, skipping Thomson Rd and Newton Rd.
		1978	5 March	Amended to ply Keng Lee Rd with the partial conversion of Kg Java Rd to one-way traffic.
			3 December	Amended to ply Mayne Rd and Bt Timah Rd with the partial conversion of Mackenzie Rd to two-way traffic.
		1979	11 February	Amended to ply the extended Shenton Way towards Telok Blangah Way Ter, skipping Parsi Rd and Anson Rd.
			28 October	Amended to ply Sungei Rd (towards Telok Blangah Way Ter) and Bt Timah Rd (towards Jln Aman Ter) with the partial conversion of Bt Timah Rd to two-way traffic and Rochor Canal Rd to one-way traffic, skipping Mackenzie Rd and Mayne Rd.
	St. Michael's ↔ Lower Delta	1980	28 September	Amended to Lower Delta Ter.
	St. Michael's ↔ Bukit Merah	1981	15 February	Amended to Bt Merah Int and amended to skip Telok Blangah Cres.
		1983	2 January	Amended to Whampoa Rd Ter and amended to ply Whampoa Rd, Whampoa Dr, Jln Bahagia and Kim Keat Rd when exiting St. Michael's Est.
		1984	1 April	Amended to ply Moulmein Rd, skipping Norfolk Rd.
			27 May	Amended to ply Whampoa Dr when entering St. Michael's Est with the closure of Jln Kebun Limau to facilitate the construction of the Central Expressway (CTE).
		1988	3 January	Serves new staggered bus stop opposite Treasury Bldg along Shenton Way, skipping the bus stop opposite Marina Hse.
	St. Michael's ↺ Shenton Way	1993	4 April	Shortened to loop at Shenton Way, amended to ply Lavender St, Serangoon Rd/Jln Besar, Rochor Canal Rd, Ophir Rd/Rochor Rd and Beach Rd and converted to a day service on weekdays and Saturdays under TransitLink Network Integration Exercise Phase 12, skipping Moulmein Rd, Thomson Rd, Keng Lee Rd, Kg Java Rd, Bt Timah Rd, Sungei Rd, Selegie Rd/Bencoolen St, Victoria St, Middle Rd and Bras Basah Rd/Stamford Rd.
		1994	TBC	Serves additional bus stop outside Balestier Twrs along Balestier Rd.
	St. Michael's ↺ Sims Dr	2000	27 November	Integrated with Service 20 and amended to loop at Sims Dr from St. Michael's Ter.
	125St. Michael's ↺ Sims Dr 125ASims Dr → Bendemeer Rd	2001	TBC	125AIntroduced from Sims Dr (Opp Blk 59) to Bendemeer Rd (Blk 54) during morning peak hours on weekdays.
		2003	21 June	Amended to ply Bendemeer Rd, Jln Besar, Kitchener Rd and Serangoon Rd under North East Line Rationalisation Phase 1.
	St. Michael's ↺ Sims Dr	2005	TBC	125ADiscontinued.
	125St. Michael's ↺ Sims Dr 125AAljunied Rd → MacPherson Rd	2010	TBC	125AIntroduced from Aljunied Rd (Opp Aljunied Stn) to MacPherson Rd (POSBank) during morning peak hours on weekdays.
		2011	29 May	Extended to operate on Sundays and Public Holidays.
		2012	25 June	Designated wheelchair-accessible bus service (WAB).

Service 126 (1971 - 1990)

Operator	Year	Date	Service changes
UBC	1971	25 October	Introduced between Jln Aman Ter and New Bridge Rd (Loop).
	1974	1 October	Serves merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
	1983	2 January	Amended to Whampoa Rd Ter and amended to ply Whampoa Rd, Whampoa Dr, Jln Bahagia and Kim Keat Rd when exiting St. Michael's Est.
			Amended to ply Whampoa Dr when entering St. Michael's Est, skipping Moulmein Green and Jln Kebun Limau.
	1987	27 April	Converted to peak hour service on weekdays and Saturdays only.
		27 September	Amended to ply the extended Eu Tong Sen St towards St. Michael's Ter to facilitate the first stage of road expansion along New Bridge Rd.
		1 November	Amended to ply Eu Tong Sen St towards St. Michael's Ter to facilitate the second stage of road expansion along New Bridge Rd.
	1989	29 January	Serves relocated bus stop opposite Sri Mariamman Tp along Sth Bridge Rd, skipping a removed bus stop opposite Jamae Mque.
	1990	16 April	Discontinued.

Service 127 / Short-Trip 127A

Operator	Route	Year	Date	Service changes
(Current)	127Tampines ↺ Tampines Ind Ave 5 127ATampines → Tampines Ave 9	2016	18 December	Introduced between Tampines Int and Tampines Ind Ave 5 (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0530 hrs and 2330 hrs daily. Wheelchair-accessible bus service (WAB) at launch.
				127AIntroduced from Tampines Int to Tampines Ave 9 (Blk 742A) under LTA's Bus Service Enhancement Programme (BSEP), operating after the last bus of Service 127 daily.Wheelchair-accessible bus service (WAB) at launch.
	127Tampines ↺ Tampines Ind Ave 5 127ATampines → Tampines North Dr 1	2020	11 October	Amended to ply Tampines Nth Dr 1 and Tampines Ave 11, skipping Tampines Ave 9 and Tampines Ave 10.
				127AAmended to terminate at the bus stop opposite Blk 610C along Tampines Nth Dr 1, with the amendment of Service 127 to ply Tampines Nth Dr 1 and Tampines Ave 11.
				127ALast bus extended to 0050 hrs daily.

Service 128 (2008 - 2020)

Operator	Year	Date	Service changes
	2008	7 July	Introduced between Ang Mo Kio Ave 6 and Shenton Way (AM Peak) and between Anson Rd and Ang Mo Kio Ave 6 (PM Peak) as a peak hour one-directional service on weekdays for a trial period of 6 months.
	2009	2 February	Amended to ply Braddell Rd and Thomson Rd, skipping Lor 6 Toa Payoh, Lor 1 Toa Payoh, Lor 2 Toa Payoh and Jln Toa Payoh.
	2012	30 September	Designated wheelchair-accessible bus service (WAB).
	2016	27 June	2 AM peak and 2 PM peak trips removed.
	2017	25 June	Amended to the relocated Shenton Way Ter.
	2020	8 April	Temporarily suspended due to COVID-19 Circuit Breaker measures in Singapore until 4 May 2020.
		5 May	Temporary suspension of service due to COVID-19 Circuit Breaker measures in Singapore extended until 1 June 2020.
		2 June	Discontinued.

Service 129 / Short-Trip 129A / Short-Trip 129B

Operator	Route	Year	Date	Service changes
(Current)	Tampines Concourse ↔ St. Michael's	2016	18 December	Introduced between Tampines Concourse Int and St. Michael's Ter under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 2330 hrs daily from Tampines Concourse Int and St. Michael's Ter. Wheelchair-accessible bus service (WAB) at launch.
		2017	28 May	Serves additional pair of bus stops outside and opposite Gambir Ridge along Bartley Rd.
	Tampines North ↔ St. Michael's	2022	27 November	Extended to Tampines Nth Int.
	129Tampines North ↔ St. Michael's 129ATampines Ave 1 → Bartley Rd 129BBartley Rd → Tampines Ave 1	2024	26 August	129AIntroduced from Tampines Ave 1 (Temasek Poly East G) to Bartley Rd (Bartley Stn Exit A) during peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
				129BIntroduced from Bartley Rd (Gambir Ridge) to Tampines Ave 1 (Opp Temasek Poly East G) during peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

Service 130 / Short-Trip 130A (2000 - 2023)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Balestier Rd ↔ Tg Pagar Rd	1971	11 April	Introduced between Balestier Rd Ter and Tg Pagar Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to United Bus Company.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
	Sin Ming Rd ↔ Tg Pagar Rd	1974	3 February	Extended to Sin Ming Rd Ter under 1974 Bus Rationalisation.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1979	11 February	Amended to ply the extended Shenton Way, Rambau St and Trafalgar St towards Tg Pagar Ter, skipping Parsi Rd.
	Sin Ming Rd ↔ Anson Rd		1 August	Amended to Anson Rd Ter.
			28 October	Amended to ply Ophir Rd and Blanco Court towards Anson Rd Ter with the conversion of Rochor Rd to one-way traffic.
		1983	2 January	Amended to ply Balestier Rd, Lavender St and Serangoon Rd/Jln Besar, skipping Rangoon Rd, Kitchener Rd, Kg Kapor Rd and Upp Weld Rd.
	Ang Mo Kio ↔ Anson Rd		30 October	Extended to Ang Mo Kio Int.
				Amended to ply Robinson Rd, skipping Cecil St.
				Amended to ply Victoria St and Jln Sultan, skipping Arab St and Rochor Canal Rd.
	Ang Mo Kio ↔ Prince Edward	1985	27 January	Amended to Prince Edward Ter with the closure of Anson Rd Ter.
	Ang Mo Kio ↔ Shenton Way	1987	28 June	Amended to Shenton Way Ter.
		1993	11 April	Amended to ply Victoria St, skipping Nth Bridge Rd.
		1999	TBC	Serves the bus stop opposite Bugis Junction along Victoria St, skipping the bus stop outside Bugis Stn.
		2000	TBC	Serves new bus stop after Shenton Way along Palmer Rd.
	130Ang Mo Kio ↔ Shenton Way 130AAng Mo Kio Int → Sin Ming Dr		TBC	130AIntroduced from Ang Mo Kio Int to Sin Ming Dr (Blk 25), operating during morning peak hours on weekdays and on the 27th day of every lunar month.
		2002	24 March	Amended to Ang Mo Kio Temp Int.
		2003	21 June	Amended to ply Serangoon Rd, Boon Keng Rd and Bendemeer Rd under North East Line Rationalisation Phase 1.
			TBC	Serves the bus stop outside Bugis Stn along Victoria St, skipping the bus stop opposite Bugis Junction.
		2006	TBC	130ARevised to operate during the Qing Ming period & Vesak Day only.
		2007	28 April	Amended to Ang Mo Kio Integrated Transport Hub.
				Serves additional bus stop outside Victoria Concert Hall along Fullerton Rd.
		2008	2 December	Designated wheelchair-accessible bus service (WAB).
		2015	19 April	Amended to ply St. Andrew's Rd and Stamford Rd, skipping Coleman St and Hill St.
		2016	1 May	Amended to ply Esplanade Dr with the partial closure of Fullerton Rd.
		2017	25 June	Amended to the relocated Shenton Way Ter.
		2020	TBC	130ARevised to operate during the Qing Ming period only.
			8 November	Skips the bus stop opposite SLF Cplx along Thomson Rd to facilitate the construction of the North-South Corridor (NSC).
		2021	26 December	Amended to ply Esplanade Dr towards Shenton Way Ter with the closure of Connaught Dr.
	Ang Mo Kio ↔ Shenton Way	2023	1 April	130ADiscontinued. (Last day of service on 18 Apr 2021)

Service 131 / Short-Trip 131A / 131B (January - June 2006)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Balestier Rd ↔ Tg Pagar Rd	1971	11 April	Introduced between Balestier Rd Ter and Tg Pagar Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1975	19 July	Amended to ply Coleman St and Armenian St, skipping Stamford Rd.
	Tg Pagar Rd ↺ Balestier Rd	1978	2 December	Amended to ply Balestier Rd, Jln Dusun and Jln Datoh due to the partial closure of Ah Hood Rd for redevelopment.
		1979	11 February	Amended to ply the extended Shenton Way, Rambau St and Trafalgar St towards Tg Pagar Ter, skipping Parsi Rd.
	Anson Rd ↺ Balestier Rd		1 August	Amended to Anson Rd Ter.
	Anson Rd ↺ Rangoon Rd	1983	2 January	Amended to loop at Norfolk Rd from Anson Rd Ter.
			3 July	Amended to ply Kent Rd and Owen Rd with the partial closure of Rangoon Rd to facilitate the construction of CTE.
	Prince Edward ↺ Rangoon Rd	1985	27 January	Amended to Prince Edward Ter with the closure of Anson Rd Ter.
		1987	7 June	Amended to ply Owen Rd, Dorset Rd, Kg Java Rd, Bt Timah Rd and Sungei Rd, skipping Race Course Rd, Kerbau Rd, Kg Kapor Rd, Upp Weld Rd and Jln Besar.
	Shenton Way ↺ Rangoon Rd		28 June	Amended to Shenton Way Ter.
	Shenton Way ↔ St. Michael’s	1992	3 May	Extended to St. Michael’s Ter under TransitLink Network Integration Exercise Phase 7.
	Bukit Merah ↔ St. Michael’s	1993	4 April	Extended to Bt Merah Int under TransitLink Network Integration Exercise Phase 12.
			11 April	Amended to ply Stamford Rd, skipping Coleman St and Armenian St.
		1999	TBC	Skips a pair of removed bus stops outside and opposite Wishart Rd along Telok Blangah Rd.
			TBC	Serves new bus stop outside Farrer Pk Tennis Ctr along Dorset Rd.
		2001	18 February	Serves new staggered bus stop outside Novena Stn along Thomson Rd, skipping the bus stop outside Novena Ch.
	131Bukit Merah ↔ St. Michael’s 131ASt. Michael’s → Shenton Way	2002	TBC	131AIntroduced from St. Michael’s Ter to Shenton Way (Opp Temasek Twr) during morning peak hours on weekdays.
		2005	19 June	Amended to ply Bt Purmei Ave in both directions.
	131Bukit Merah ↔ St. Michael’s 131ASt. Michael’s → Shenton Way 131BSerangoon Rd → Norfolk Rd	2006	23 January	131BIntroduced as a short-trip service from Serangoon Rd (Tekka Ctr) to Norfolk Rd (Bef Carlisle Rd) during evening peak hours on weekdays.
	131Bukit Merah ↔ St. Michael’s 131ASt. Michael’s → Shenton Way		1 June	131BDiscontinued.
			29 October	Serves new bus stop outside VivoCity along Telok Blangah Rd.
		2007	28 April	Serves additional bus stop outside Victoria Concert Hall along Fullerton Rd.
		2008	7 December	Skips removed bus stop opposite Temenggong D Mque along Telok Blangah Rd.
		2011	16 October	Amended to ply Middle Rd, Selegie Rd, Prinsep St and Bras Basah Rd with the partial closure of Bencoolen St to facilitate the construction of DT21 Bencoolen station on the Downtown Line.
			3 December	Designated wheelchair-accessible bus service (WAB).
		2014	25 August	Last bus from Bt Merah Int extended to 2400 hrs daily.
		2016	1 May	Amended to ply Esplanade Dr towards St. Michael’s Ter with the partial closure of Fullerton Rd.
			11 December	Amended to ply the reinstated Bencoolen St, skipping Middle Rd, Selegie Rd, Prinsep St and Bras Basah Rd.
		2021	26 December	Amended to ply Esplanade Dr towards Bt Merah Int with the closure of Connaught Dr.

Service 131M (2014 - 2022)

Operator	Route	Year	Date	Service changes
	Bukit Merah ↺ Bukit Purmei	2014	25 August	Introduced between Bt Merah Int and Bt Purmei Ave (Loop) as a peak hour variant of Service 131 on weekdays, replacing Service 275. Wheelchair-accessible bus service (WAB) at launch.
		2022	12 December	Discontinued.

Service 132

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Ang Mo Kio Ave 6 ↺ Orchard Rd	1978	9 October	Introduced between Ang Mo Kio Ave 6 Ter and Orchard Rd (Loop).
	Ang Mo Kio ↺ Orchard Rd	1979	12 August	Amended to Ang Mo Kio Ave 3 Ter.
		1981	5 July	Amended to Ang Mo Kio Ctrl 2 Ter.
		1983	10 April	Amended to Ang Mo Kio Int.
	Ang Mo Kio ↔ Bukit Merah	1984	29 January	Extended to Bt Merah Int.
		1986	16 November	Serves new staggered bus stop outside Thong Teck Bldg along Scotts Rd, skipping the bus stop outside Metro Orchard.
	Hougang South ↔ Bukit Merah	1988	18 December	Extended to Hougang Int.
		1990	21 February	Skips removed bus stop opposite Jasmine Rd along Upp Thomson Rd.
			27 May	Serves additional bus stop outside Police Academy along Whitley Rd.
		2000	4 June	Serves new pair of bus stops outside and opposite British High Comm along Tanglin Rd.
	Hougang Ctrl ↔ Bukit Merah	2004	15 February	Amended to Hougang Ctrl Int with the closure of Hougang Sth Int.
		2013	31 March	Designated wheelchair-accessible bus service (WAB).
		2020	8 November	Skips the bus stop opposite SLF Cplx along Thomson Rd to facilitate the construction of the North-South Corridor (NSC).
		2023	23 July	Amended to ply temporary slip road and Mt Pleasant Rd towards Hougang Ctrl Int with the temporary closure of slip road to PIE Exit 17D, serving new staggered bus stop after Mt Pleasant Rd along Thomson Rd.

Service 132A (1984 - 1986)

Operator	Year	Date	Service changes
	1984	30 January	Introduced between Ang Mo Kio Int and Tomlinson Rd (Loop) as a peak hour service on weekdays & Saturdays.
	1986	14 April	Discontinued.

Service 133 / Short-Trip 133A (2000 - 2010)

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Ang Mo Kio Ave 6 ↺ North Bridge Rd	1978	29 December	Introduced between Ang Mo Kio Ave 6 Ter and Nth Bridge Rd (Loop).
	Ang Mo Kio ↺ North Bridge Rd	1980	6 January	Amended to Ang Mo Kio Ave 3 Ter.
		1981	5 July	Amended to Ang Mo Kio Ctrl 2 Ter.
		1983	6 February	Amended to ply CTE towards Ang Mo Kio Ctrl 2 Ter with the closure of temporary slip road between Braddell Rd and Lor Chuan.
			10 April	Amended to Ang Mo Kio Int.
			20 June	Amended to ply CTE towards Nth Bridge Rd.
	Ang Mo Kio ↔ Marina Ctr	1987	26 July	Extended to Marina Ctr Ter.
		1989	5 November	Amended to ply Ang Mo Kio Ave 1, Boundary Rd, Serangoon Ave 2 and Upp Serangoon Rd, skipping CTE.
	Ang Mo Kio ↺ Temasek Ave	1997	23 March	Amended to loop at Temasek Ave and amended to ply Kallang Rd and Victoria St, skipping Crawford St and Nth Bridge Rd.
		2000	TBC	Last bus extended to 2345 hrs on Saturdays.
	133Ang Mo Kio ↺ Temasek Ave 133AAng Mo Kio → Raffles Ave		TBC	133AIntroduced from Ang Mo Kio Int to Raffles Ave (Opp Marina Sq) during morning peak hours on weekdays.
		2002	24 March	Amended to Ang Mo Kio Temp Int.
			TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		2007	28 April	Amended to Ang Mo Kio Integrated Transport Hub.
	Ang Mo Kio ↔ Shenton Way	2010	26 April	Extended to Shenton Way Ter.
				133ADiscontinued with the route extension of Service 133 to Shenton Way Ter.
		2011	30 May	Last bus from Shenton Way Ter extended to 2400 hrs daily.
			26 September	Designated wheelchair-accessible bus service (WAB).
		2012	14 January	Serves relocated bus stop after Marina St along Marina Stn Rd.
		2013	29 December	Amended to ply Central Blvd and Shenton Way with the opening of MCE.
		2014	28 September	Amended to ply Robinson Rd and Marina Blvd towards Ang Mo Kio Int, skipping Maxwell Rd and Central Blvd with the road changes in Marina Sth area.
		2017	25 June	Amended to the relocated Shenton Way Ter.

Service 133A (1988 - 1989)

Operator	Year	Date	Service changes
	1988	10 July	Introduced between Ang Mo Kio Int and Marina Ctr Ter as an alternate route of Service 133 via Boundary Rd and Serangoon Ave 2.
	1989	5 November	Integrated with Service 133 and discontinued.

Service 133M (2010 - 2012)

Operator	Year	Date	Service changes
	2010	26 April	Introduced between Shenton Way Ter and Temasek Ave (Loop).
		4 October	Revised to operate on Saturdays, Sundays and Public Holidays only.
	2011	26 September	Designated wheelchair-accessible bus service (WAB).
	2012	26 May	Discontinued.

Service 134 (1980 - 1993)

Operator	Year	Date	Service changes
	1980	17 August	Introduced between Ang Mo Kio Ave 3 Ter and New Bridge Rd Ter.
	1981	5 July	Amended to Ang Mo Kio Ctrl 2 Ter.
	1983	10 April	Amended to Ang Mo Kio Int.
	1987	6 June	Amended to the relocated New Bridge Rd Ter.
		27 September	Amended to ply the extended Eu Tong Sen St towards Ang Mo Kio Int to facilitate the first stage of road expansion along New Bridge Rd.
		1 November	Amended to ply Eu Tong Sen St towards Ang Mo Kio Int to facilitate the second stage of road expansion along New Bridge Rd.
	1988	20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
	1992	3 May	Shortened to Bishan Int under TransitLink Network Integration Exercise Phase 7.
	1993	11 April	Amended to ply Hill St and New Bridge Rd, skipping Nth Bridge Rd, Sth Bridge Rd and Upp Cross St.
		5 December	Integrated with Service 104 to form Service 54 and discontinued under TransitLink Network Integration Exercise Phase 14.

Service 134 (since 2016)

Operator	Route	Year	Date	Service changes
(Current)	Sims Pl ↺ Marine Terrace	2016	20 March	Introduced between Sims Pl Ter and Marine Terr (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2345 hrs daily. Wheelchair-accessible bus service (WAB) at launch.

Service 135/Short-Trip 135A

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Toa Payoh ↔ Bedok Rd	1974	3 February	Re-numbered from Service 155A between Toa Payoh Town Ctr Ter and Bedok Rd Ter under 1974 Bus Rationalisation.
	Toa Payoh ↔ Upp Changi Rd 8¼ ms		10 November	Amended to Upp Changi Rd 8¼ ms (13.3 km) Ter.
		1975	2 March	Amended to ply Sims Ave towards Bedok Rd Ter with the conversion of Geylang Rd to one-way traffic.
		1976	18 July	Amended to skip Tanah Merah Besar Rd and Nicoll Dr on Sundays and Public Holidays.
			30 December	Amended to ply Sims Ave/Geylang Rd and the extended Tg Katong Rd, skipping Guillemard Rd.
		1979	TBC	Relocated to Upp Changi Rd 15.5km Ter.
	Toa Payoh ↔ Somapah Depot	1980	16 June	Amended to Somapah Depot.
			28 December	Amended to ply Upp Changi Rd East, skipping Upp Changi Rd.
	Toa Payoh ↔ Marine Parade	1981	21 June	Shortened to Marine Parade Ter.
	Marine Parade ↺ Circuit Rd	1983	26 December	Shortened to loop at Circuit Rd from Marine Parade Ter and amended to ply Marine Parade Rd, skipping East Coast Rd.
	Marine Parade ↔ Ang Mo Kio	1987	19 April	Extended to Ang Mo Kio Int.
		1994	TBC	First bus from Marine Parade Ter brought forward to 0545 hrs on weekdays and Saturdays.
	135Ang Mo Kio ↺ Siglap Rd 135AAng Mo Kio → Siglap Rd	2001	16 September	Amended to loop at Siglap Rd from Ang Mo Kio Int with the closure of Marine Parade Ter.
				135AIntroduced from Ang Mo Kio Int to Siglap Rd (Opp Mandarin Gdns), operating after the last bus of Service 135 daily.
		2002	24 March	Amended to Ang Mo Kio Temp Int.
			TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	16 March	Amended to ply Eunos Ave 5 and Eunos Rd 8 with the partial closure of Paya Lebar Rd to facilitate the construction of EW8 CC9 EW8 CC9 Paya Lebar station on the Circle Line.
			TBC	Serves new bus stop outside Victoria Sch along Marine Parade Rd.
			TBC	Serves new bus stop outside Shell Kiosk along Tg Katong Rd.
	135Ang Mo Kio ↺ Siglap Rd 135AAng Mo Kio → Marine Parade Rd	2005	25 April	135AExtended to terminate at Marine Parade Rd (Victoria Sch).
		2007	28 April	Amended to Ang Mo Kio Integrated Transport Hub.
		2009	23 August	Amended to ply the reinstated Paya Lebar Rd, skipping Eunos Ave 5 and Eunos Rd 8.
			22 November	Serves new bus stop opposite MacPherson Stn along Circuit Lk.
		2011	7 March	Designated wheelchair-accessible bus service (WAB).
			26 June	Amended to ply Lor Bengkok with the closure of Circuit Lk to facilitate the construction of CC10 DT26 CC10 DT26 MacPherson station on the Downtown Line.
		2016	16 October	Amended to ply the reinstated Circuit Lk, skipping Lor Bengkok.
		2017	12 March	Amended to ply Upp Serangoon Rd and the diverted Upp Aljunied Rd.
		2018	23 September	Amended to ply ECP and Bedok Sth Ave 1 with the partial closure of Siglap Lk to facilitate the construction of TE28 Siglap on the Thomson–East Coast Line.
		2020	22 March	Amended to ply the reinstated Siglap Lk, skipping ECP and Bedok Sth Ave 1.
	Ang Mo Kio ↔ Jln Kembangan	2021	28 February	Amended to terminate at Jln Kembangan (Kembangan Stn) via Telok Kurau Rd, East Coast Rd and Frankel Ave and converted to bi-directional service, skipping Siglap Rd and a portion of Marine Parade Rd.
				135ADiscontinued with the amendment of Service 135 to Jln Kembangan (Kembangan Stn).
		2025	13 April	Amended to ply Haig Rd and Dunman Rd, skipping a section of Tg Katong Rd.

Service 136 (1974 - 1975)

Operator	Route	Year	Date	Service changes
	Toa Payoh ↺ Stamford Rd (Feb 1974 - 1974)	1974	3 February	Re-numbered from Service 140A as a service between Toa Payoh Town Ctr Ter and Stamford Rd (Loop).
	Toa Payoh ↔ Prince Edward (1974 - 1975)		TBC	Extended to Prince Edward Ter.
		1975	TBC	Discontinued.

Service 136 (since 1978) / Short-Trip 136A (2002 - 2003)

Operator	Route	Year	Date	Service changes
Known as prior to 1 November 2001	Ang Mo Kio Ave 6 ↔ Upp Serangoon Rd (10.5 km)	1978	27 July	Introduced between Ang Mo Kio Ave 6 Ter and Upp Serangoon Rd 10.5 km Ter.
	Ang Mo Kio Ave 6 ↺ Upp Serangoon Rd		4 December	Extended to loop at Upp Serangoon Rd.
	Ang Mo Kio ↺ Upp Serangoon Rd	1980	6 January	Amended to Ang Mo Kio Ave 3 Ter.
		1981	5 July	Amended to Ang Mo Kio Ctrl 2 Ter.
		1983	10 April	Amended to Ang Mo Kio Int.
		1994	TBC	Last bus extended to 2345 hrs on Saturdays.
	Ang Mo Kio ↔ Hougang Ctrl		18 December	Amended to Hougang Ctrl Int.
	Ang Mo Kio ↺ Hougang Ave 8	1996	22 June	Amended to loop at Hougang Ave 8 from Ang Mo Kio Int.
	Ang Mo Kio ↺ Upp Serangoon Rd	2001	1 January	Amended to loop at Upp Serangoon Rd.
			15 July	Amended to u-turn around Boundary Rd before proceeding to Yio Chu Kang Rd towards Ang Mo Kio Int, serving an additional bus stop outside S'pore Crocodilarium along Upp Serangoon Rd.
	136Ang Mo Kio ↺ Punggol Ctrl 136AAng Mo Kio → Punggol Ctrl	2002	17 February	Extended to loop at Punggol Ctrl from Ang Mo Kio Int.
				136AIntroduced from Ang Mo Kio Int to Punggol Ctrl (Opp Blk 293), operating after the last bus of Service 136 daily.
			24 March	Amended to Ang Mo Kio Temp Int.
	136Ang Mo Kio ↺ Punggol Stn 136AAng Mo Kio → Punggol Stn	2003	14 September	Amended to loop at Punggol Ctrl.
				136AAmended to terminate at Punggol Ctrl (Punggol Stn).
	Ang Mo Kio ↔ Punggol		30 November	Amended to Punggol Temp Int.
				136ADiscontinued with the route amendment of Service 136 to Punggol Temp Int.
		2007	28 April	Amended to Ang Mo Kio Integrated Transport Hub.
		2011	7 March	Designated wheelchair-accessible bus service (WAB).
(Current)		2016	4 September	Operations transferred to Go-Ahead Singapore.

Service 137 (since 2017) / Short-Trip 137A

Operator	Route	Year	Date	Service changes
(Current)	Sims Pl ↔ Upp East Coast	2017	21 October	Introduced between Sims Pl Ter and Upp East Coast Ter under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily from Sims Pl Ter and Upp East Coast Ter. Wheelchair-accessible bus service (WAB) at launch.
	137Sims Pl ↔ Upp East Coast 137ANew Upp Changi Rd → Bedok North Rd	2019	11 February	137AIntroduced from New Upp Changi Rd (Bedok Stn Exit B) to Bedok Nth Rd (Bedok Nth Stn Exit A) during morning peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

Service 138 (1972 - 1974)

Operator	Year	Date	Service changes
UBC	1972	26 June	Introduced between Toa Payoh Town Ctr Ter and Jln Aman (Loop).
	1974	3 February	Discontinued under 1974 Bus Rationalisation.

Service 138 (1978 - 1988)

Operator	Route	Year	Date	Service changes
	Ang Mo Kio Ave 6 ↺ Robinson Rd (1978 - 1979)	1978	27 July	Introduced between Ang Mo Kio Ave 6 Ter and Robinson Rd (Loop), replacing Blue Arrow Service 308.
			3 December	Amended to ply Mayne Rd and Bt Timah Rd with the partial conversion of Mackenzie Rd to two-way traffic.
		1979	11 February	Amended to ply the extended Shenton Way, Keppel Rd and Anson Rd, skipping Parsi Rd.
	Ang Mo Kio ↺ Robinson Rd (1979 - 1981)		12 August	Amended to Ang Mo Kio Ave 3 Ter.
			15 October	Amended to ply Marymount Rd, converted to a semi-express service operating on weekdays and Saturdays only.
			28 October	Amended to ply Sungei Rd (towards Shenton Way) and Bt Timah Rd (towards Ang Mo Kio Ave 3 Ter) with the partial conversion of Bt Timah Rd to two-way traffic and Rochor Canal Rd to one-way traffic, skipping Mackenzie Rd and Mayne Rd.
		1981	5 July	Amended to Ang Mo Kio Ctrl 2 Ter.
			11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
	Ang Mo Kio ↺ Shenton Way (1981 - 1988)		2 November	Converted to express service, calling at key bus stops along Ang Mo Kio Ave 3, Ang Mo Kio Ave 6, Anson Rd, Robinson Rd, Collyer Quay, Connaught Dr and Coleman St.
		1982	TBC	Last bus extended to 1930 hrs on weekdays & Saturdays.
		1983	10 April	Amended to Ang Mo Kio Int.
		1985	15 April	Serves all bus stops along Connaught Dr, Collyer Quay, Raffles Quay and Shenton Way and amended to ply Dhoby Ghaut, Selegie Rd, Bt Timah Rd and Kg Java Rd towards Ang Mo Kio Int.
		1986	7 January	Serves all bus stops along Marymount Rd.
		1988	24 January	Discontinued.

Service 138 / Short-Trip 138A (June - October 2009) / 138A (since 2012) / 138B (2015 - 2025) / 138C

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Yio Chu Kang ↺ Mandai Lake Rd	1994	26 April	Introduced between Yio Chu Kang Ter and Mandai Lake Rd (Loop).
	Ang Mo Kio ↺ Mandai Lake Rd		1 October	Amended to Ang Mo Kio Int.
		1996	TBC	Serves new bus stop outside Jubilee along Ang Mo Kio Ave 8.
		1997	TBC	Serves new bus stop before Mandai Rd along Mandai Lake Rd.
		2002	24 March	Amended to Ang Mo Kio Temp Int and amended to ply Ang Mo Kio Ave 3 and Ang Mo Kio Ave 6.
	Ang Mo Kio ↺ Mandai Lake Rd	2007	28 April	Amended to Ang Mo Kio Integrated Transport Hub.
	138Ang Mo Kio ↺ Mandai Lake Rd 138AAng Mo Kio Int → Ang Mo Kio Ave 5	2009	22 June	138AIntroduced from Ang Mo Kio Int to Ang Mo Kio Ave 5 (Opp Blk 604) during evening peak hours on weekdays.
	Ang Mo Kio ↺ Mandai Lake Rd		12 October	138ADiscontinued.
		2011	26 September	Designated wheelchair-accessible bus service (WAB).
	138Ang Mo Kio ↺ Mandai Lake Rd 138AAng Mo Kio → Mandai Lake Rd	2012	1 December	138AIntroduced from Ang Mo Kio Int to Mandai Lake Rd (Singapore Zoo) on Saturdays, Sundays and Public Holidays. Wheelchair-accessible bus service (WAB) at launch.
	138Ang Mo Kio ↺ Mandai Lake Rd 138AAng Mo Kio → Mandai Lake Rd 138BAng Mo Kio → Ang Mo Kio Ave 5	2015	19 October	138BIntroduced from Ang Mo Kio Int to Ang Mo Kio Ave 5 (Opp Blk 604) during evening peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
		2018	14 October	Skips a pair of removed bus stops before and after Singapore Zoo along Mandai Lake Rd.
		2024	14 October	138AEnhanced to operate from Upp Thomson Rd (Springleaf Stn Exit 3) to Mandai Lake Rd (Singapore Zoo) during weekday morning peak hours.
	138Ang Mo Kio ↺ Mandai Lake Rd 138AAng Mo Kio → Mandai Lake Rd 138BAng Mo Kio → Ang Mo Kio Ave 5 138CMandai Lake Rd → Upp Thomson Rd		8 December	138CIntroduced from Mandai Lake Rd (Singapore Zoo) to Upper Thomson Rd (Springleaf Stn Exit 2) on weekends and public holidays, operating from 1445 hrs to 1900 hrs. Wheelchair-accessible bus service (WAB) at launch.
	138Ang Mo Kio ↺ Mandai Lake Rd 138AUpp Thomson Rd → Mandai Lake Rd 138CMandai Lake Rd → Upp Thomson Rd	2025	15 March	138AShortened to start from Upp Thomson Rd (Springleaf Stn Exit 3), operating in the mornings and weekend afternoons.
				138BDiscontinued.

Service 138M

Operator	Route	Year	Date	Service changes
(Current)	Ang Mo Kio ↺ Ang Mo Kio Ave 6	2025	15 March	Introduced as a supplementary service between Ang Mo Kio Int and Ang Mo Kio Ave 6 (Loop) on Weekdays and Saturdays. Wheelchair-accessible bus service (WAB) at launch.

Service 139 / Short-Trip 139A (2012 - 2014) / 139A (since 2022)

Operator	Route	Year	Date	Service changes
United Bus Company	Toa Payoh ↔ Lengkok Bahru	1971	21 September	Introduced between Toa Payoh Town Ctr Ter and Lengkok Bahru Ter.
			28 September	Amended to ply the extended Ganges Ave towards Toa Payoh Town Ctr Ter.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	1 October	Serves merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1979	11 November	Amended to ply Ganges Ave towards Lengkok Bahru Ter with the realignment of Delta Circus.
	Toa Payoh ↔ Bukit Merah		23 December	Amended to Bt Merah Ctrl Ter.
		1980	20 January	Amended to ply the branch road of Havelock Rd towards Bt Merah Ctrl Ter.
			28 September	Amended to Bt Merah Int.
		1983	26 December	Amended to Toa Payoh Int.
		1986	2 February	Amended to ply Orchard Rd and Penang Rd towards Bt Merah Int, skipping Fort Canning Rd.
		1991	21 April	Amended to ply Bt Merah Ctrl.
		1992	TBC	Amended to ply Clemenceau Ave towards Toa Payoh Int, skipping Tank Rd.
		1993	4 April	Integrated with Service 122 and amended to ply River Valley Rd, Delta Rd and Alexandra Rd under TransitLink Network Integration Exercise Phase 12, skipping Havelock Rd, Ganges Ave, Lower Delta Rd and Tiong Bahru Rd.
		1997	29 December	Amended to ply Ah Hood Rd, Jln Rajah, Whampoa Rd, Jln Bahagia and Kim Keat Rd/Whampoa Dr.
		1998	31 May	Amended to Toa Payoh Temp Int.
		1999	TBC	Skips removed bus stops outside Rajah Maisonette along Jln Rajah and outside Tai Gin Apts and outside Moulmein CC along Ah Hood Rd.
			TBC	First bus from Toa Payoh Temp Int brought forward to 0530 hrs on weekdays.
		2000	TBC	Serves additional bus stop outside Blk 4 along Delta Rd.
		2002	19 May	Amended to Toa Payoh Integrated Transport Hub.
		2003	21 June	Amended to ply Serangoon Rd, Boon Keng Rd and Bendemeer Rd under North East MRT Line Rationalisation Phase 1.
		2007	16 January	Skips relocated bus stop outside Dhoby Ghaut Stn along Penang Rd.
		2011	16 October	Amended to ply Middle Rd, Selegie Rd, Prinsep St and Bras Basah Rd with the partial closure of Bencoolen St to facilitate the construction of DT21 Bencoolen on the Downtown Line
	139Toa Payoh ↔ Bukit Merah 139AToa Payoh → Kim Keat Rd	2012	27 August	139AIntroduced from Toa Payoh Int to Kim Keat Rd (Opp Jumbo Ind Bldg) during evening peak hours on weekdays.
		2013	3 December	Designated wheelchair-accessible bus service (WAB).
	Toa Payoh ↔ Bukit Merah	2014	14 September	139ADiscontinued with the introduction of Service 139M.
		2016	11 December	Amended to ply the reinstated Bencoolen St, skipping Middle Rd, Selegie Rd, Prinsep St and Bras Basah Rd.
		2018	28 October	Amended to ply McNair Rd and Towner Rd, skipping Serangoon Rd.
	139Toa Payoh ↔ Bukit Merah 139AToa Payoh → Jln Bahagia	2022	12 December	139AIntroduced from Toa Payoh Int to Jln Bahagia (Bet Blks 33/34) during evening peak hours on weekdays, replacing Service 139M.

Service 139M (2014 - 2022)

Operator	Year	Date	Service changes
	2014	14 September	Introduced between Toa Payoh Int and Jln Bahagia (Loop) under the LTA's Bus Service Enhancement Programme (BSEP). Wheelchair-accessible at launch.
	2022	11 December	Discontinued with the introduction of Short-Trip 139A.

Service 140 (1971 - 1988)

Operator	Route	Year	Date	Service changes
UBC	Lor 6 Toa Payoh ↔ Prince Edward (Apr - Aug 1971)	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Prince Edward Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Prince Edward (Aug 1971 - 1983)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1974	24 February	Amended to ply Grange Rd, Orchard Blvd and Paterson Rd towards Toa Payoh Town Ctr Ter with the conversion of Orchard Rd to one-way traffic.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1975	21 July	Amended to ply Stamford Rd, skipping Coleman St and Armenian St.
		1976	14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1979	11 February	Amended to ply the extended Shenton Way, Palmer Rd and Anson Rd, skipping Parsi Rd.
	Toa Payoh ↺ Orchard Rd (1983 - 1988)	1983	26 December	Amended to Toa Payoh Int, shortened to loop at Orchard Rd and converted into a semi-express service.
		1987	13 December	Serves new staggered bus stop outside Orchard Stn along Orchard Blvd, skipping the bus stop opposite Orchard Stn.
				Serves new bus stop outside Newton Stn along Scotts Rd.
		1988	24 January	Discontinued.

Service 140 (since 2014)

Operator	Route	Year	Date	Service changes
(Current)	Lor 1 Geylang ↺ St. Wilfred Rd	2014	14 December	Introduced between Lor 1 Geylang Ter and St. Wilfred Rd (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily.
		2015	30 March	Designated wheelchair-accessible bus service (WAB).

Service 140A (1971 - 1974)

Operator	Route	Year	Date	Service changes
UBC	Lor 1 Toa Payoh ↺ Stamford Rd (Apr - Aug 1971)	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Stamford Rd (Loop) under 1971 Bus Reorganisation.
	Toa Payoh ↺ Stamford Rd (Aug 1971 - 1974)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1974	3 February	Re-numbered Service 136 under 1974 Bus Rationalisation.

Service 141 (1971 - 1988)

Operator	Route	Year	Date	Service changes
STC	Kim Keat Ave ↔ Prince Edward (Apr - Aug 1971)	1971	11 April	Introduced between Kim Keat Ave Ter and Prince Edward Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Prince Edward (Aug 1971 - 1983)		2 August	Amended to Toa Payoh Town Ctr Ter.
UBC			6 December	Operations transferred to UBC.
		1974	8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1975	21 July	Amended to ply St. Andrew's Rd and Stamford Rd, skipping Coleman St and Hill St.
		1976	14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1979	11 February	Amended to ply the extended Shenton Way, Palmer Rd and Anson Rd, skipping Parsi Rd.
		1983	2 January	Amended to serve Balestier Rd, Lavender St and Serangoon Rd/Jln Besar, skipping Rangoon Rd and Kitchener Rd.
	Toa Payoh ↺ Robinson Rd (1983 - 1985)		26 December	Amended to Toa Payoh Int, amended to loop at Robinson Rd and converted to a semi-express service on weekdays and Saturdays only.
	Toa Payoh ↺ Cecil St (1985 - 1988)	1985	15 April	Serves all bus stops along Connaught Dr, Collyer Quay, Raffles Quay and Shenton Way and amended to ply Cecil St, Dhoby Ghaut, Selegie Rd, Bt Timah Rd and Kg Java Rd towards Toa Payoh Int.
		1988	24 January	Discontinued.

Service 141 (since 2013)

Operator	Route	Year	Date	Service changes
(Current)	Lor 1 Geylang ↔ Toa Payoh	2013	9 June	Introduced between Lor 1 Geylang Ter and Toa Payoh Int under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily from Lor 1 Geylang Ter and between 0600 hrs and 2345 hrs daily from Toa Payoh Int.
			30 September	Designated wheelchair-accessible bus service (WAB).
		2020	8 November	Skips the bus stop opposite SLF Cplx along Thomson Rd to facilitate the construction of the North-South Corridor (NSC).
		2024	24 March	Serves new bus stop outside Blk 131B along Toa Payoh Rise.

Service 141A (1971 - 1974)

Operator	Route	Year	Date	Service changes
STC	Lor 6 Toa Payoh ↺ Finlayson Green (Apr - Aug 1971)	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Finlayson Green (Loop) under 1971 Bus Reorganisation.
	Toa Payoh ↺ Finlayson Green (Aug 1971 - 1974)		2 August	Amended to Toa Payoh Town Ctr Ter.
UBC			6 December	Operations transferred to UBC.
		1974	3 February	Integrated with Service 141 and discontinued under 1974 Bus Rationalisation.

Service 142 (1971 - 1976)

Operator	Route	Year	Date	Service changes
STC	Lor 1 Toa Payoh ↔ South Canal (Apr - Aug 1971)	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Sth Canal Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ South Canal (Aug 1971 - 1976)		2 August	Amended to Toa Payoh Town Ctr Ter.
ABC			6 December	Operations transferred to ABC.
		1972	11 June	Amended to ply the extended Upp Cross St with the partial conversion of Havelock Rd to one-way traffic, skipping New Bridge Rd.
		1974	24 February	Amended to ply Grange Rd and Orchard Blvd with the conversion of Orchard Rd to one-way traffic, skipping Orchard Rd.
		1976	TBC	Discontinued.

Service 142 (since 1984) /Short-Trip 142A

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001.	Potong Pasir ↺ Toa Payoh	1984	25 November	Introduced between Potong Pasir Ter and Toa Payoh Int (Loop).
		1985	5 May	Enhanced to ply Potong Pasir Ave 2 and Potong Pasir Ave 3 before terminating at Potong Pasir Ter.
			15 December	Amended to ply Jln Toa Payoh and Lor 2 Toa Payoh towards Toa Payoh Int with the partial closure of Kim Keat Ave.
		1987	6 July	Last bus from Potong Pasir Ter extended to 2330 hrs daily.
	Toa Payoh ↺ Potong Pasir Ave 1	1989	TBC	Amended to start from Toa Payoh Int and loop at Potong Pasir Ave 1.
		1994	5 March	Amended to ply Kim Keat Lk and Lor 6 Toa Payoh towards Toa Payoh Int.
		1998	31 May	Amended to Toa Payoh Temp Int.
				Serves new pair of bus stops outside and opposite Toa Payoh Swim Cplx along Lor 6 Toa Payoh.
		2002	19 May	Amended to Toa Payoh Integrated Transport Hub.
		2003	TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		2006	16 April	Serves new bus stop outside Blk 120 along Potong Pasir Ave 1.
		2008	TBC	Last bus extended to 0005 hrs daily.
		2009	26 October	Designated wheelchair-accessible bus service (WAB).
		2011	4 September	Amended to skip Bendemeer Rd, Whampoa Nth and Serangoon Rd towards Toa Payoh Int with the permanent closure of Whampoa Nth.
	142Toa Payoh ↺ Potong Pasir Ave 1 142AToa Payoh ↺ Potong Pasir Ave 1 → Upp Serangoon Rd	2018	24 December	142AIntroduced from Toa Payoh Int to Upp Serangoon Rd (Sant Ritz) during morning peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

Service 143

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Lor 6 Toa Payoh ↔ Jurong Rd 16.2 km Mkt	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Jurong Rd 16.2 km Mkt Ter under 1971 Bus Reroganisation.
	Toa Payoh ↔ Jurong Rd 16.2 km Mkt		2 August	Amended to Toa Payoh Town Ctr Ter.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1972	11 June	Amended to ply the extended Upp Cross St with the partial conversion of Havelock Rd to one-way traffic, skipping New Bridge Rd.
Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	24 February	Amended to ply Grange Rd, Orchard Blvd and Paterson Rd towards Toa Payoh Town Ctr Ter with the conversion of Orchard Rd to one-way traffic.
	Toa Payoh ↔ Teban Gardens	1981	1 February	Amended to Jurong Depot.
			19 April	Amended to ply Pandan Gardens and Teban Gdns Rd.
		1982	24 May	Amended to ply West Coast Highway.
		1983	26 December	Amended to Toa Payoh Int.
		1987	1 November	Amended to ply Eu Tong Sen St towards Toa Payoh Int to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop outside Orchard Stn along Orchard Blvd, skipping the bus stop opposite Orchard Stn.
				Serves new bus stop outside Newton Stn along Scotts Rd.
		1988	20 March	Amended to ply New Bridge Rd, skipping Upp Pickering St, Sth Bridge Rd and Neil Rd.
		1992	19 July	Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
			TBC	Amended to ply Clemenceau Ave towards Toa Payoh Int, skipping Tank Rd.
		1995	7 May	Amended to ply Orchard Turn.
		1997	7 December	Amended to ply Upp Pickering St, Sth Bridge Rd and Neil Rd with the partial closure of New Bridge Rd to facilitate the construction of NE4 DT19 NE4 DT19 Chinatown station on the North East Line.
		1998	31 May	Amended to Toa Payoh Temp Int.
		1999	20 September	Serves new pair of bus stops outside and opposite West Bay Resort Condo along West Coast Rd.
			TBC	Skips a pair of removed bus stops outside and opposite Wishart Rd along Telok Blangah Rd.
		2000		Last bus from Teban Gdns Ter extended to 2400 hrs on Saturdays.
		2001		Amended to ply West Coast Rd and Penjuru Rd with the partial closure of Teban Gardens Rd.
		2002	20 April	Amended to ply the reinstated New Bridge Rd, skipping Upp Pickering St, Sth Bridge Rd and Neil Rd.
	143Toa Payoh ↔ Jurong East 143AJurong East → Teban Gdns Rd		12 May	Integrated with Service 331 and extended to Jurong East Int.
				143AIntroduced from Jurong East Int to Teban Gdns Rd (Bef Hasanah Mque), operating after the last bus of Service 143 from Jurong East Int daily.
			19 May	Amended to Toa Payoh Integrated Transport Hub.
			7 July	Skips the bus stop outside Orchard Emerald along Orchard Rd.
			TBC	Skips removed bus stop opposite ITE Pasir Panjang along Telok Blangah Rd.
			17 November	Amended to ply Pandan Gdns.
		2004	TBC	143First bus from Jurong East Int brought forward to 0525 hrs on weekdays and Saturdays.
		2005	3 April	Serves 2 new bus stops opposite Blks 34/35 and opposite Blk 47 along West Coast Rd.
			2 July	Amended to ply Grange Rd and Orchard Lk with the partial closure of Somerset Rd.
		2006	29 October	Serves new bus stop outside VivoCity along Telok Blangah Rd and a relocated bus stop outside Orchard Stn along Orchard Turn.
		2007	17 December	Designated wheelchair-accessible bus service (WAB).
		2008	7 December	Skips removed bus stop opposite Temenggong D Mque along Telok Blangah Rd.
		2011	17 December	Amended to Jurong East Temp Int.
		2013	29 December	Serves new bus stop outside Outram Pk Stn along New Bridge Rd.
	Toa Payoh ↔ Jurong East	2014	18 May	143ADiscontinued with the introduction of 143M.
(Current)		2016	12 June	Operations transferred to Tower Transit Singapore.
		2017	26 November	Serves bus stop after Hosp Dr along Eu Tong Sen St with the removal of the bus stop before Hosp Dr along Kg Bahru Rd.
		2020	6 December	Amended to relocated Jurong East Temp Int and serve new bus stop before Jurong East Stn along Jurong Gateway Rd.
		2023	8 January	Amended to ply realigned Teban Gdns Rd with the permanent partial closure of Teban Gdns Rd to facilitate the construction of JE7 Pandan Reservoir station on the Jurong Region Line, skipping the bus stop before Pandan Gdns along Jurong Town Hall Rd.
				Skips the bus stop outside Newton Stn Exit B along Scotts Rd temporarily to facilitate upgrading works.
			27 August	Serves reinstated bus stop outside Newton Stn Exit B along Scotts Rd.

Service 143M

Operator	Route	Year	Date	Service changes
	Jurong East ↺ Pandan Gardens	2014	18 May	Introduced between Jurong East Temp Int and Pandan Gdns (Loop) under the LTA's Bus Service Enhancement Programme (BSEP). Wheelchair-accessible bus service (WAB) at launch.
			24 August	Serves additional bus stop outside Blk 411 along West Coast Rd.
(Current)		2016	12 June	Operations transferred to Tower Transit Singapore.
				First bus revised to 0525 hrs on Saturdays. Last bus extended to 0105 hrs daily.
		2019	5 October	Last bus extended to 0115 hrs daily.
		2020	6 December	Amended to relocated Jurong East Temp Int and serve new bus stop before Jurong East Stn along Jurong Gateway Rd.
		2023	8 January	Amended to ply realigned Teban Gdns Rd with the permanent partial closure of Teban Gdns Rd to facilitate the construction of JE7 Pandan Reservoir station on the Jurong Region Line, skipping the bus stop before Pandan Gdns along Jurong Town Hall Rd.

Service 144 (1971 - 1982)

Operator	Route	Year	Date	Service changes
ABS	Kim Keat Ave ↔ Commonwealth Ave (Apr - Aug 1971)	1971	11 April	Introduced between Kim Keat Ave Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Commonwealth Ave (Aug 1971 - 1982)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1972	11 June	Amended to ply the extended Upp Cross St with the partial conversion of Havelock Rd to one-way traffic, skipping New Bridge Rd.
		1974	24 February	Amended to ply Grange Rd, Orchard Blvd and Paterson Rd towards Toa Payoh Town Ctr Ter with the conversion of Orchard Rd to one-way traffic.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
		1977	17 May	Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
		1981	5 July	Amended to ply Cantonment Rd towards Commonwealth Ave Ter, skipping a portion of Neil Rd and New Bridge Rd.
		1982	11 April	Discontinued.

Service 145 /Short-Trip 145A

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Lor 1 Toa Payoh ↔ Keppel Harbour	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Keppel Harbour Ter under 1971 Bus Reorganisation.
	Lor 1 Toa Payoh ↔ Pasir Panjang Rd		2 May	Extended to Pasir Panjang Rd Ter.
	Toa Payoh ↔ Pasir Panjang Rd		2 August	Amended to Toa Payoh Town Ctr Ter.
United Bus Company			6 December	Operations transferred to United Bus Company.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1979	1 August	Amended to ply Lim Teck Kim Rd and Cantonment Rd with the closure of Tg Pagar Ter.
		1980	20 January	Amended to ply Hoe Chiang Rd towards Pasir Panjang Rd Ter, skipping Lim Teck Kim Rd.
		1981	17 May	Amended to skip Moulmein Green.
	Toa Payoh ↔ Kent Ridge		5 July	Extended to Kent Ridge Ter.
		1983	26 December	Amended to Toa Payoh Int.
		1987	16 February	First bus from Toa Payoh Int brought forward to 0530 hrs on weekdays and Saturdays.
			27 September	Amended to ply the extended Eu Tong Sen St towards Toa Payoh Int to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Toa Payoh Int to facilitate the second stage of road expansion along New Bridge Rd.
	Toa Payoh ↔ Buona Vista	1989	27 August	Integrated with Service 186 and extended to Buona Vista Ter.
		1998	31 May	Amended to Toa Payoh Temp Int.
		1999	TBC	Skips a pair of removed bus stops outside and opposite Wishart Rd along Telok Blangah Rd.
		2000	TBC	Last bus from Buona Vista Ter extended to 2400 hrs on Saturdays.
		2001	TBC	First bus from Toa Payoh Temp Int brought forward to 0530 hrs daily.
		2002	19 May	Amended to Toa Payoh Integrated Transport Hub.
		2004	TBC	First bus from Buona Vista Ter brought forward to 0530 hrs on weekdays and Saturdays.
		2005	TBC	Serves additional bus stop outside Clarke Quay Stn along Eu Tong Sen St.
		2006	29 October	Serves new bus stop outside VivoCity along Telok Blangah Rd.
		2008	7 December	Skips removed bus stop opposite Temenggong D Mque along Telok Blangah Rd.
	145Toa Payoh ↔ Buona Vista 145ATiong Bahru Rd → Henderson Rd	2010	28 June	145AIntroduced from Tiong Bahru Rd (Redhill Stn) to Henderson Rd (Blk 1) during morning peak hours on weekdays.
		2013	9 June	Designated wheelchair-accessible bus service (WAB).
		2014	27 April	Serves new bus stop outside Queens Condo along Commonwealth Ave.
		2019	23 June	Serves new bus stop outside Tower 15 along Hoe Chiang Rd.
		2024	15 September	Serves new bus stop along Alexandra Rd opposite Cycle & Carriage.

Service 146 (1971 - 1989)

Operator	Route	Year	Date	Service changes
STC	Lor 1 Toa Payoh ↔ Keppel Harbour (Apr - May 1971)	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Keppel Harbour Ter under 1971 Bus Reorganisation.
	Lor 1 Toa Payoh ↔ Pasir Panjang Rd (May - Aug 1971)		2 May	Extended to Pasir Panjang Rd Ter.
	Toa Payoh ↔ Pasir Panjang Rd (Aug 1971 - 1981)		2 August	Amended to Toa Payoh Town Ctr Ter.
UBC			6 December	Operations transferred to UBC.
		1972	18 June	Amended to ply Bendemeer Rd towards Pasir Panjang Rd Ter with the conversion of Serangoon Rd to one-way traffic.
		1974	1 October	Serves merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1979	11 February	Amended to ply the extended Shenton Way towards Pasir Panjang Rd Ter, skipping Parsi Rd and Anson Rd.
	Toa Payoh ↔ Kent Ridge (1981 - 1983)	1981	5 July	Amended to Kent Ridge Ter.
	Toa Payoh ↔ Clementi (1983 - 1989)	1983	26 December	Amended to Toa Payoh Int.
				Integrated with Service 176 and extended to Clementi Int.
		1985	15 December	Amended to ply Jln Toa Payoh and Lor 2 Toa Payoh towards Toa Payoh Int with the partial closure of Kim Keat Ave.
		1988	3 January	Serves new staggered bus stop opposite Treasury Bldg along Shenton Way, skipping the bus stop opposite Marina Hse.
			11 January	Serves merged bus stop along Ayer Rajah Rd.
			8 March	Amended to ply Clementi Ave 3 with the abolition of right turning from Clementi Ave 3 to Commonwealth Ave West.
		1989	27 August	Integrated with Service 166 and discontinued.

Service 146 (since 2024)

Operator	Route	Year	Date	Service changes
(Current)	Bartley Rd ↺ Bidadari Park Dr	2024	25 February	Introduced between Bartley Rd and Bidadari Pk Dr (Loop). Wheelchair-accessible bus service (WAB) at launch.
	Woodleigh ↔ Bartley Rd	2025	20 April	To be extended to Woodleigh Integrated Transport Hub.

Service 147 / Short-Trip 147A

Operator	Route	Year	Date	Service changes
Associated Bus Services	Lor 6 Toa Payoh ↔ Commonwealth Ave	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Commonwealth Ave		2 August	Amended to Toa Payoh Town Ctr Ter.
		1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
(Current) Known as prior to 1 November 2001		1973	1 July	Operations transferred to Singapore Bus Services.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
		1976	13 June	Amended to ply Lower Delta Rd, skipping Henderson Rd.
		1977	17 May	Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
		1980	13 July	Amended to ply Commonwealth Ave with the conversion of Queens Circus to a signalised junction, skipping Queensway and Commonwealth Dr.
	Toa Payoh ↔ Buona Vista	1982	27 May	Amended to Buona Vista Ter.
	Buona Vista ↺ Potong Pasir Ave 1	1983	26 December	Amended to loop at Potong Pasir Ave 1 from Buona Vista Ter.
	Jurong East ↔ Potong Pasir	1984	24 June	Integrated with Service 79, extended to Jurong East Ter and amended to ply Kg Bahru Rd and Jln Bt Merah, skipping Outram Rd, Tiong Bahru Rd and Lower Delta Rd.
				Amended to Potong Pasir Ter.
		1985	5 May	Enhanced to ply Potong Pasir Ave 2 and Potong Pasir Ave 3 before terminating at Potong Pasir Ter.
			30 June	Amended to Jurong East Int.
		1987	27 September	Amended to ply the extended Eu Tong Sen St towards Potong Pasir Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Potong Pasir Ter to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
		1988	20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1989	19 February	Serves new bus stop outside Blk 135 along Jurong East St 13.
	Jurong East ↔ Upp Serangoon	1992	29 March	Integrated with Service 83, extended to Upp Serangoon Ter and amended to ply Waterloo St/Bras Basah Rd, Middle Rd, Selegie Rd/Bencoolen St and Serangoon Rd/Jln Besar under TransitLink Network Integration Exercise Phase 6, skipping Lavender St, Crawford St/Kallang Rd and Nth Bridge Rd/Victoria St.
			29 November	Alternate trips were introduced between Upp Serangoon Ter and Commonwealth Ave West (Clementi Stn) under TransitLink Network Integration Exercise Phase 10.
		1993	11 April	Amended to ply Victoria St, Hill St and New Bridge Rd, skipping Nth Bridge Rd, Sth Bridge Rd and Upp Cross St.
	Clementi ↔ Upp Serangoon		5 December	Shortened to Clementi Int with alternate trips withdrawn under TransitLink Network Integration Exercise Phase 14.
	Hougang Ctrl ↔ Clementi	1994	18 December	Amended to Hougang Ctrl Int.
		1997	7 December	Amended to ply Upp Pickering St, Sth Bridge Rd and Neil Rd with the partial closure of New Bridge Rd to facilitate the construction of NE4 DT19 Chinatown station on the North East Line.
		1999	TBC	Skips temporarily closed bus stops outside and opposite Sch of Mechanical & Mfg along Commonwealth Ave West.
			10 July	Skips the bus stop outside Plaza By The Pk along Bras Basah Rd.
				Amended to ply Prinsep St, skipping Waterloo St and Middle Rd.
		2000	TBC	Serves additional bus stop after Jln Bt Merah along Kg Bahru Rd.
	147Hougang Ctrl ↔ Clementi 147AHougang Ctrl → Serangoon Central		TBC	147AIntroduced from Hougang Ctrl Temp Ter to Serangoon Ctrl (Blk 206) during morning peak hours daily.
		2001	18 October	Serves reinstated bus stops outside Dover Stn along Commonwealth Ave West.
		2002	20 April	Amended to ply the reinstated New Bridge Rd, skipping Upp Pickering St, Sth Bridge Rd and Neil Rd.
			TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		2003	TBC	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	147Hougang Ctrl ↔ Clementi 147AHougang Ctrl → Bencoolen St		TBC	147AExtended to terminate at Bencoolen St (Plaza By The Pk).
	147Hougang Ctrl ↔ Clementi 147AHougang Ctrl → New Bridge Rd	2004	TBC	147AExtended to terminate at New Bridge Rd (Opp Pearl's Ctr).
		2005	TBC	Serves additional bus stop outside Clarke Quay Stn along Eu Tong Sen St.
		2006	29 October	Amended to Clementi Temp Int.
			30 October	Designated wheelchair-accessible bus service (WAB).
		2011	16 October	Amended to ply Middle Rd, Selegie Rd, Prinsep St and Bras Basah Rd with the partial closure of Bencoolen St to facilitate the construction of DT21 Bencoolen station on the Downtown Line.
			26 November	Amended to Clementi Integrated Transport Hub.
		2013	29 December	Serves new bus stop outside Outram Pk Stn along New Bridge Rd.
		2015	TBC	147ARevised to operate during morning peak hours on weekdays only.
		2016	11 December	Amended to ply the reinstated Bencoolen St, skipping Middle Rd, Selegie Rd, Prinsep St and Bras Basah Rd.
		2017	26 November	Serves bus stop after Hosp Dr along Eu Tong Sen St with the removal of the bus stop before Hosp Dr along Kg Bahru Rd.

Service 148 (1971 - 1989)

Operator	Route	Year	Date	Service changes
ABC	Kim Keat Ave ↔ Commonwealth Ave (Apr - Aug 1971)	1971	11 April	Introduced between Kim Keat Ave Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Commonwealth Ave (Aug 1971 - 1982)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
		1975	6 July	Amended to ply Jln Kolam Ayer, Kallang Bahru, Boon Keng Rd, Lor 1 Geylang and Sims Ave/Geylang Rd, skipping Lavender St.
		1977	17 May	Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
			29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
	Toa Payoh ↔ Buona Vista (1982 - 1989)	1982	27 May	Amended to Buona Vista Ter.
			11 June	Amended to ply Bendemeer Rd and Geylang Bahru, skipping Jln Kolam Ayer.
		1983	1 January	Amended to ply Woodsville Flyover, skipping Bendemeer Rd, Whampoa Nth and Serangoon Rd.
			26 December	Amended to Toa Payoh Int.
		1985	15 December	Amended to ply Jln Toa Payoh and Lor 2 Toa Payoh towards Toa Payoh Int with the partial closure of Kim Keat Ave.
		1987	27 September	Amended to ply Sth Bridge Rd, Nth Canal Rd and Eu Tong Sen St, skipping Upp Circular Rd.
		1989	27 August	Integrated with Service 26 and discontinued.

Service 148 (March - November 1992)

Operator	Year	Date	Service changes
	1992	29 March	Introduced between Clementi Int and Lor 1 Geylang Ter under TransitLink Network Integration Exercise Phase 6.
		29 November	Discontinued under TransitLink Network Integration Exercise Phase 10.

Service 148 (since 2025)

Operator	Route	Year	Date	Service changes
(Upcoming)	Woodleigh ↺ Potong Pasir Ave 1	2025	20 April	To be introduced between Woodleigh Int and Potong Pasir Ave 1 (Loop) under LTA's Bus Connectivity Enhancement Programme (BCEP), operating between 0600hrs and 0000hrs daily. Wheelchair-accessible bus service (WAB) at launch.

Service 149 (1971 - 1980)

Operator	Route	Year	Date	Service changes
UBC	Kim Keat Ave ↔ Prince Edward (Apr - Aug 1971)	1971	11 April	Introduced between Kim Keat Ave Ter and Prince Edward Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Prince Edward (Aug 1971 - 1980)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1974	3 February	Integrated with Service 149A and amended to ply Lor 6 Toa Payoh, Lor 2 Toa Payoh, Lor 1A Toa Payoh, Lor 1 Toa Payoh, Lor 2 Toa Payoh, Lor 3 Toa Payoh, Lor 4 Toa Payoh, Lor 5 Toa Payoh, Lor 4 Toa Payoh and Lor 1 Toa Payoh under 1974 Bus Rationalisation.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1975	21 July	Amended to ply Stamford Rd, skipping Coleman St and Armenian St.
		1976	14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1978	5 March	Amended to ply Keng Lee Rd with the partial conversion of Kg Java Rd to one-way traffic.
			3 December	Amended to ply Mayne Rd and Bt Timah Rd with the partial conversion of Mackenzie Rd to two-way traffic.
		1979	11 February	Amended to ply the extended Shenton Way, Palmer Rd and Anson Rd, skipping Parsi Rd.
			28 October	Amended to ply Sungei Rd (towards Prince Edward Ter) and Bt Timah Rd (towards Toa Payoh Town Ctr Ter) with the partial conversion of Bt Timah Rd to two-way traffic and Rochor Canal Rd to one-way traffic, skipping Mackenzie Rd and Mayne Rd.
		1980	3 February	Integrated with Service 150 and discontinued.

Service 149 (1983 - 1993)

Operator	Year	Date	Service changes
	1983	25 June	Introduced between Toa Payoh Town Ctr Ter and Changi Airport PTB (Loop) under Changi Airport Bus Plan 1983.
		26 December	Amended to Toa Payoh Int.
	1984	14 September	Amended to ply Siglap Rd and Siglap Lk towards Changi Airport with the opening of ECP.
	1985	15 December	Amended to ply Jln Toa Payoh and Lor 2 Toa Payoh towards Toa Payoh Int with the partial closure of Kim Keat Ave.
	1989	19 November	Serves new bus stop outside Kallang Stn along Sims Ave.
	1990	13 October	Amended to serve Changi Airport PTB 2.
	1991	7 July	Serves new bus stop outside PA Sea Sports Ctr along ECP.
	1993	5 December	Integrated with Services 16 and 31 and discontinued under TransitLink Network Integration Exercise Phase 14.

Service 149A (1971 - 1974)

Operator	Route	Year	Date	Service changes
UBC	Lor 1 Toa Payoh ↺ Finlayson Green (Apr - Aug 1971)	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Finlayson Green (Loop) under 1971 Bus Reorganisation.
	Toa Payoh ↺ Finlayson Green (Aug 1971 - 1974)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1974	3 February	Integrated with Service 149 and discontinued under 1974 Bus Rationalisation.

Service 150 (1971 - 1990)

Operator	Route	Year	Date	Service changes
UBC	Lor 1 Toa Payoh ↔ Crawford St (Apr - Aug 1971)	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Crawford St Ter under 1971 Bus Reorganisation.
	Toa Payoh ↔ Crawford St (Aug 1971 - 1990)		2 August	Amended to Toa Payoh Town Ctr Ter.
		1978	5 March	Amended to ply Keng Lee Rd with the partial conversion of Kg Java Rd to one-way traffic.
			3 December	Amended to ply Mayne Rd and Bt Timah Rd with the partial conversion of Mackenzie Rd to two-way traffic.
		1979	28 October	Amended to ply Sungei Rd (towards Crawford St Ter) and Weld Rd, Jln Besar and Bt Timah Rd (towards Toa Payoh Town Ctr Ter) with the partial conversion of Bt Timah Rd to two-way traffic and Rochor Canal Rd to one-way traffic, skipping Mackenzie Rd and Mayne Rd.
		1980	3 February	Integrated with Service 149 and amended to ply Jln Sultan, Beach Rd, Middle Rd and Selegie Rd towards Toa Payoh Town Ctr Ter, skipping Arab St, Rochor Canal Rd, Weld Rd, Jln Besar and Rochor Canal Rd.
		1983	26 December	Amended to Toa Payoh Int.
		1990	2 September	Integrated with Service 56 and discontinued.

Service 150 (since 2016)

Operator	Route	Year	Date	Service changes
(Current)	Eunos ↺ Marine Terrace	2016	20 March	Introduced between Eunos Int and Marine Terr (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0600 hrs and 2330 hrs daily. Wheelchair-accessible bus service (WAB) at launch.