History of Services 101 - 120

Service 101

Operator	Service Gen	Year	Date	Service changes
Singapore Traction Company	1st Gen (1971 - 1990)	1971	11 April	Introduced between Serangoon Garden Ter and New Bridge Rd Ter under 1971 Bus Reorganisation.
Associated Bus Service			6 December	Operations transferred to Associated Bus Service (ABS).
		1972	18 June	Amended to ply Bendemeer Rd towards New Bridge Rd Ter with the conversion of Serangoon Rd to one-way traffic.
		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.
		1985	TBC	Amended to loop at New Bridge Rd.
		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 Garden Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Serangoon Garden Ter to facilitate the second stage of road expansion along 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		1990	2 September	Integrated with Service 83 and withdrawn.
(Current)	2nd Gen (Since 2004)	2004	15 February	Re-introduced between Serangoon Int and Buangkok Cres (Loop), replacing Service 328.
		2005	14 August	Amended to loop at Buangkok Link, 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 Link.
		2018	23 December	Serves new bus stop opposite Blk 984A along Buangkok Link.
		2019	25 August	Amended to loop at Buangkok Cres after Buangkok Link.

Service 101A

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	1974	3 February	Withdrawn under 1974 Bus Rationalisation.

Service 102

Operator	Service Gen	Year	Date	Service changes
Singapore Traction Company	1st Gen (1971 - 1976)	1971	11 April	Introduced between Serangoon Garden Ter and Prince Edward Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to United Bus Company (UBC).
		1972	18 June	Amended to ply Bendemeer Rd towards Prince Edward Ter with the conversion of Serangoon Rd to one-way traffic.
		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.
			20 December	Withdrawn.
	2nd Gen (1981 - 1983)	1981	2 March	Re-introduced between Jln Kayu Ter and New Bridge Rd Ter, operating on weekdays and Saturdays only.
		1983	14 November	Withdrawn.
(Current)	3rd Gen (Since 2015)	2015	20 September	Re-introduced between Hougang Central Int and Jln Kayu (Loop) under the LTA's Bus Service Enhancement Programme (BSEP). Wheelchair-accessible at launch.
		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.

Service 102A

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

Service 103

Operator	Year	Date	Service changes
Associated Bus Service	1971	11 April	Introduced between Serangoon Garden 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.
	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.
	1982	TBC	Amended to Buona Vista Ter.
	1987	6 April	Skips abolished 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 North Bridge Rd, skipping the bus stop outside St Andrew's Cathedral.
	1989	29 January	Serves relocated bus stop opposite Sri Mariamman Tp along South Bridge Rd, skipping abolished bus stop opposite Jamae Mosque.
	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 Service (TIBS).
	1998	TBC	Skips a pair of temporarily abolished bus stops before and after Seletar West Farmway 1 along Jln Kayu.
	1999	TBC	Skips the bus stop outside Plaza By The Park along Bras Basah Rd.
		26 December	Operations transferred to SBS.
	2001	15 July	Amended to ply Yio Chu Kang Link and Boundary Rd.
(Current)	2002	TBC	Serves new pair of bus stops after Sommerville Rd and after Sunshine Lodge along Upp Serangoon Rd.
		TBC	Serves reinstated pair of bus stops before and after Sengkang West Ave along Jln Kayu.
	2003	20 June	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		7 December	Shortened to start from Serangoon Int and loop at Piccadilly, replacing Service 378 under North East MRT Line Rationalisation Phase 3.
	2007	1 July	Skips abolished bus stop after East Camp Gate along Piccadilly.
	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).
	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.

Service 103A

Operator	Year	Date	Service changes
Associated Bus Service	1971	11 April	Introduced between Serangoon Garden 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.
	1974	3 February	Re-numbered Service 106 under 1974 Bus Rationalisation.

Service 103W/103M

Operator	Year	Date	Service changes
	2003	7 December	Introduced between Serangoon Int and West Camp Rd (Loop) as Service 103W, replacing Service 379 under North East MRT Line Rationalisation Phase 3.
	2008	28 January	Re-numbered Service 103M.
	2011	13 February	Integrated with Service 103 and withdrawn with the partial closure of West Camp Rd and New West Camp Rd.

Service 104

Operator	Year	Date	Service changes
United Bus Company	1971	23 April	Introduced between Serangoon Garden Ter and Upp Cross St (Loop).
	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 Garden Ter with the conversion of Irwell Bank Rd to one-way traffic.
	1977	31 October	Amended to skip Chartwell Dr, Burghley Dr and Berwick Dr with the introduction of Service 217.
	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.
	1988	13 March	Amended to Serangoon Int.
	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 withdrawn under TransitLink Network Integration Exercise Phase 14.

Service 105

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1974 - 1976)	1974	3 February	Re-numbered from Service 102A as a service between Serangoon Garden 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.
			20 December	Withdrawn.
	2nd Gen (Since 1988)	1988	13 March	Re-introduced between Serangoon Int and Clementi Int, replacing Service 95.
		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 abolished bus stops outside and opposite Sch of Mechanical & Mfg along Commonwealth Ave West.
		2001	18 October	Serves reinstated bus stops outside Dover Stn along Commonwealth Ave West.
(Current)		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.
			17 December	Amended to Jurong East Temp Int.
		2012	26 March	Designated wheelchair-accessible bus service (WAB).

Service 105A

Operator	Year	Date	Service changes
	2000	TBC	Introduced as a short-trip service from Serangoon Int to Whitley Rd (Aft Tanglin CC) during morning peak hours on weekdays.
	2003	TBC	Shortened to terminate at Lor 2 Toa Payoh (Toa Payoh Stn).
	2011	TBC	Withdrawn.

Service 105B

Operator	Year	Date	Service changes
	2000	TBC	Introduced as a short-trip service from Jurong East Int to Commonwealth Ave West (Clementi Stn) during morning peak hours on weekdays.
(Current)	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	17 December	Amended to Jurong East Temp Int.
	2012	26 March	Designated wheelchair-accessible bus service (WAB).

Service 106

Operator	Year	Date	Service changes
	1974	3 February	Re-numbered from Service 103A as a service between Serangoon Garden Ter and Commonwealth Ave Ter.
		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.
		7 November	Amended to ply Orchard Rd, Penang Rd, Somerset Rd, Grange Rd, Orchard Blvd, Tanglin Rd, Napier Rd, Holland Rd, Holland Ave, Holland Dr, North Buona Vista Rd and Commonwealth Ave, skipping Bras Basah Rd, North Bridge Rd, South Bridge Rd, Upp Circular Rd, New Bridge Rd, River Valley Rd, Delta Rd, Alexandra Rd, Tanglin Rd, Margaret Dr, Queensway, round Queens Circus, Queensway, Commonwealth Dr, Commonwealth Ave, Queens Circus and Commonwealth Ave.
	1982	TBC	Amended to Buona Vista Ter.
	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.
	1988	13 March	Amended to Serangoon Int.
	1992	TBC	Amended to ply Orchard Link, skipping Grange Rd.
	1998	7 October	Convert from partial Air-con to fully Air-con.
	1999	TBC	Skips temporarily abolished bus stops outside and opposite Sch of Mechanical & Mfg along Commonwealth Ave West.
	2000	24 December	Operations transferred to Trans-Island Bus Service (TIBS).
	2001	18 October	Serves reinstated bus stops outside Dover Stn along Commonwealth Ave West.
	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	20 June	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		27 July	Shortened to Marina Ctr Ter under North East MRT Line Rationalisation Phase 2.
	2005	2 July	Amended to ply Grange Rd with the partial closure of Somerset Rd.
	2010	26 April	Extended to Shenton Way Ter.
	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 South 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 106A

Operator	Service Gen	Year	Date	Service changes
	1st Gen (2000 - 2003)	2000	TBC	Introduced as a short-trip service from Bt Batok Int to Commonwealth Ave West (Opp Blk T1A SP) during morning peak hours on weekdays.
		2003	TBC	Withdrawn.
	2nd Gen (2010 - 2012)	2010	22 September	Re-introduced as a temporary short-trip service from Marina Blvd (The Sail) to Central Blvd (Aft Marina Stn Rd) during Formula 1 Singapore Grand Prix.
		2012	23 September	Withdrawn.
	3rd Gen (Since 2013)	2013	1 October	Re-introduced as a short-trip service from Bt Batok Int to Commonwealth Ave West (Clementi Stn) during morning peak hours on weekdays.
		2015	14 June	Designated wheelchair-accessible bus service (WAB).
(Current)		2016	29 May	Operations transferred to Tower Transit Singapore.

Service 107

Operator	Year	Date	Service changes
	1978	23 January	Introduced between Serangoon Garden 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	11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
	1988	3 January	Serves new staggered bus stop opposite Treasury Bldg along Shenton Way, skipping the bus stop opposite Marina House.
		13 March	Amended to Serangoon Int, converted to full day trunk service and amended to ply Kallang Bahru and Marina Centre.
	1989	11 June	Amended to skip Marina Centre.
	1994	3 July	Amended to ply Kallang Rd, Victoria St and Jln Sultan towards Shenton Way, skipping Crawford St.
	1997	TBC	Converted to day service with the introduction of Service 107X.
(Current)	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.
		20 June	Calls at a new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		30 November	Extended to Hougang Central Int and amended to Shenton Way Ter under North East MRT Line Rationalisation Phase 3, replacing the deleted sectors of Service 97.
	2007	28 April	Serves additional bus stop outside Victoria Concert Hall along Fullerton Rd.
	2009	27 December	Serves the bus stop opposite S'pore 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.

Service 107A

Operator	Year	Date	Service changes
	2000	TBC	Introduced as a short-trip service from Serangoon Int to Shenton Way (Opp Temasek Twr) during morning peak hours on weekdays.
	2003	30 November	Withdrawn under North East MRT Line Rationalisation Phase 3.

Service 107X/107M

Operator	Year	Date	Service changes
	1997	TBC	Introduced 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.
(Current)	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.
		20 June	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		30 November	Extended to Hougang Central Int under North East MRT Line Rationalisation Phase 3, replacing the deleted sectors of Service 97.
	2008	28 January	Re-numbered Service 107M.
	2015	3 December	Designated wheelchair-accessible bus service (WAB).

Service 109

Operator	Year	Date	Service changes
(Current)	2006	28 May	Introduced between Serangoon Int and Changi Village Ter.
	2011	3 September	Amended to Serangoon Integrated Transport Hub and amended to ply Boundary Rd, replacing the deleted sectors 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.
	2014	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.

Service 109A

Operator	Year	Date	Service changes
(Current)	2014	26 May	Introduced as a short-trip service from Serangoon Integrated Transport Hub to Hougang Ave 4 (Blk 913) during evening peak hours on weekdays. Wheelchair-accessible at launch.

Service 110

Operator	Service Gen	Year	Date	Service changes
Singapore Traction Company	1st Gen (1971 - 1977)	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, North Bridge Rd and Bras Basah Rd, skipping Nicoll Highway.
Associated Bus Service			6 December	Operations transferred to Associated Bus Service (ABS).
		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 withdrawn.
(Current)	2nd Gen (Since 2017)	2017	22 October	Re-introduced between Compassvale Int and Changi Airport PTB 4 (Loop). Wheelchair-accessible at launch.

Service 111

Operator	Year	Date	Service changes
Singapore Traction Company	1971	11 April	Introduced between Upp Serangoon Rd 10.5 km Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
Associated Bus Service		6 December	Operations transferred to Associated Bus Service (ABS).
	1972	18 June	Amended to ply Bendemeer Rd towards Commonwealth Ave Ter with the conversion of Serangoon Rd to one-way traffic.
	1974	24 February	Amended to ply Grange Rd and Orchard Blvd with the conversion of Orchard Rd to one-way traffic, skipping Orchard Rd and Tanglin Rd.
		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.
	1982	TBC	Amended to Buona Vista Ter.
	1983	30 October	Amended to Hougang Int.
	1989	5 November	Extended to Ghim Moh Ter.
	1992	TBC	Amended to ply Orchard Link, skipping Grange Rd.
	1994	17 December	Extended to Hougang Central Int.
	1998	24 May	Amended to temporary site of Hougang Central Int.
	1999	TBC	Serves new pair of bus stops outside and opposite British High Commission along Tanglin Rd.
	2001	20 May	Amended back to original site of Hougang Central Int.
(Current)	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	20 June	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
		27 July	Shortened to loop at Temasek Ave from Ghim Moh Ter under North East MRT 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.

Service 112

Operator	Service Gen	Year	Date	Service changes
Singapore Traction Company	1st Gen (1971 - 1985)	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 (UBC).
		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.
		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.
		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 Park Rd with the partial conversion of Cantonment Rd to one-way traffic.
		1981	11 January	Shortened to loop at Empress Pl from Commonwealth Ave Ter and amended to ply Cecil St and Shenton Way.
		1982	TBC	Amended to Buona Vista Ter.
		1984	10 June	Converted to peak hour service on weekdays and Saturdays.
		1985	24 November	Withdrawn.
(Current)	2nd Gen (Since 2004)	2004	15 February	Re-introduced between Hougang Central Int and Hougang St 92 (Loop) with the integration of Services 322 and 327.
		2013	9 June	Designated wheelchair-accessible bus service (WAB).

Service 112A

Operator	Year	Date	Service changes
(Current)	2004	15 February	Introduced as a short-trip service from Hougang Central 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).

Service 113

Operator	Year	Date	Service changes
(Current)	2004	15 February	Introduced between Hougang Central Int and Upp Paya Lebar Rd (Loop) with the integration of Services 321 and 326.
	2010	28 February	Designated wheelchair-accessible bus service (WAB).

Service 113A

Operator	Year	Date	Service changes
(Current)	2005	27 June	Introduced as a short-trip service 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).
	2018	13 August	Morning peak route extended to start from Upp Serangoon Rd (Kovan Stn Exit C).

Service 115

Operator	Year	Date	Service changes
(Current)	2004	30 October	Introduced between Hougang St 21 and Hougang Ave 3 (Loop).
	2014	3 December	Designated wheelchair-accessible bus service (WAB).

Service 116

Operator	Service Gen	Year	Date	Service changes
(Current)	1st Gen (2006)	2006	3 April	Introduced between Hougang Central Int and Buangkok View (Buangkok Green Medical Park) (Loop) for a trial period of 3 months.
			15 August	Withdrawn.
	2nd Gen (Since 2012)	2012	18 November	Re-introduced between Hougang Central Int and Serangoon Central (Loop) under the LTA's Bus Service Enhancement Programme (BSEP).
		2013	31 March	Designated wheelchair-accessible bus service (WAB).

Service 116A

Operator	Year	Date	Service changes
(Current)	2019	15 April	Introduced as a short-trip service from Serangoon North Ave 4 (Blk 504A CP) to Serangoon Central (S'goon Stn Exit C/Blk 201) during morning peak hours on weekdays. Wheelchair-accessible at launch.

Service 117

Operator	Year	Date	Service changes
(Current)	2015	20 December	Introduced between Punggol Temp Int and Sembawang Int under the LTA's Bus Service Enhancement Programme (BSEP). Wheelchair-accessible at launch.
	2016	24 April	Amended to ply West Camp Rd.
	2017	26 November	Serves additional bus stop outside Punggol Stn/Int along Punggol Central.
	2018	27 May	Serves new pair of bus stops outside and opposite The Visionaire along Canberra Link.
		25 November	Serves 3 new bus stops before and opposite Blk 469B and opposite Yishun St 43 along Yishun Ave 1.
	2019	2 November	Serves new pair of bus stops outside and opposite Canberra Stn along Canberra Link.

Service 117A

Operator	Year	Date	Service changes
(Current)	2019	14 January	Introduced as a short-trip service from Yishun Ave 1 (Opp Blk 430B) to Yishun Ave 2 (Bef Khatib Stn) during morning peak hours on weekdays. Wheelchair-accessible at launch.

Service 117B

Operator	Year	Date	Service changes
(Current)	2019	11 March	Introduced as a short-trip service from Sembawang Int to Yishun Ave 2 (Opp Yishun Stn) during morning peak hours on weekdays. Wheelchair-accessible at launch.
		2 November	Serves a new bus stop opposite Canberra Stn along Canberra Link.

Service 118

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1988 – 1990)	1988	24 January	Introduced between Hougang Int and Tomlinson Rd (Loop).
		1990	16 December	Integrated with Service 111 and withdrawn.
	2nd Gen (Since 2015)	2015	20 December	Re-introduced between Punggol Temp Int and Changi Business Park Ter under the LTA's Bus Service Enhancement Programme (BSEP). Wheelchair-accessible 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.
		2017	21 October	Amended to ply Changi South Ave 1 and Changi Business Park Ave 1, skipping Changi South Ave 2.
			26 November	Serves additional bus stop outside Punggol Stn/Int along Punggol Central.

Service 118A

Operator	Year	Date	Service changes
(Current)	2017	10 April	Introduced as a short-trip service from TPE (Aft Punggol Rd) to Simei Ave (ITE Coll East Adm Blk) during morning peak hours on weekdays. Wheelchair-accessible at launch.

Service 118B

Operator	Year	Date	Service changes
(Current)	2017	10 April	Introduced as a short-trip service from Simei Ave (Opp ITE Coll East Adm Blk) to TPE (Bef Punggol Rd) during evening peak hours on weekdays. Wheelchair-accessible at launch.

Service 119

Operator	Year	Date	Service changes
	2003	14 September	Introduced between Sengkang Integrated Transport Hub 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.
	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).
	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.
		13 November	Serves new pair of bus stops opposite Blk 293D and outside Blk 286B along Sengkang East Rd.

Service 120

Operator	Service Gen	Year	Date	Service changes
Singapore Traction Company	1st Gen (1971)	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 Gen (1974 - 1989)	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 staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1981	23 August	Shortened to loop at Beach Rd.
		1983	2 January	Amended to ply Whampoa Dr, skipping Moulmein Green and Jln Kebun Limau.
		1985	26 May	Amended to Whampoa Rd Ter.
		1989	TBC	Withdrawn.
(Current)	3rd Gen (Since 2013)	2013	21 April	Re-introduced between New Bridge Rd Ter and Telok Blangah Heights (Loop) under the LTA's Bus Service Enhancement Programme (BSEP).
			9 June	Designated wheelchair-accessible bus service (WAB).
		2017	26 November	Skips abolished bus stop before Hospital Dr along Kg Bahru Rd.
			10 December	Serves new bus stop opposite Blk 91A along Telok Blangah St 31.
		2018	10 March	Shortened to Kg Bahru Ter with the closure of New Bridge Rd Ter.

Service 120/120A

Operator	Year	Date	Service changes
Singapore Traction Company	1971	9 May	Re-numbered from Service 120 between Jln Aman Ter and Prince Edward Rd Ter.
Associated Bus Service		6 December	Operations transferred to Associated Bus Service (ABS).
	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

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