History of Services 100 - 109

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)

Bus Service 101

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)

Bus Service 102

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)

Bus Service 103

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)

Bus Service 105

Service 106 (Current)

Bus Service 106

Service 107 (Current)

Bus Service 107

Service 107X/107M (Current)

Bus Service 107M

Service 109 / Short Trip 109A

Bus Service 109

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)

Bus Service 110

Service 111 (Current)

Bus Service 111

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)

Bus Service 112

Service 113 (Current)

Bus Service 113

Service 114 (Current)

Bus Service 114

Service 115 (Current)

Bus Service 115

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)

Bus Service 116

Service 117 / Service 117M / Short Trip 117A / Short Trip 117B (2019 - 2020)

Bus Service 117/117M

Service 118 (1988 - 1990)

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

Service 118 (since 2015) / Short Trip 118A / Short Trip 118B

Bus Service 118

Service 119

Bus Service 119

Service 120 (April - May 1971)

Operator	Year	Date	Service changes
STC	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.

Service 120 (1974 - 1989)

Operator	Route	Year	Date	Service changes
	St. Michael's ↔ Prince Edward (1974 - 1981)	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.
		1979	11 February	Amended to ply the extended Shenton Way, Palmer Rd and Anson Rd, skipping Parsi Rd.
	St. Michael's ↺ Beach Rd (1981 - 1989)	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.

Service 120 (since 2013)

Bus Service 120

Service 120/120A (1971 - 1974)

Operator	Year	Date	Service changes
STC	1971	9 May	Re-numbered from Service 120 between Jln Aman Ter and Prince Edward Ter.
ABS		6 December	Operations transferred to 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 (April - May 1971)

Operator	Year	Date	Service changes
STC	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)

Bus Service 121

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)

Bus Service 122

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

Bus Service 123

Service 123M

Bus Service 123M

Service 124

Bus Service 124

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

Bus Service 125

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

Bus Service 127

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

Bus Service 129

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

Bus Service 130

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

Bus Service 131

Service 131M (2014 - 2022)

Bus Service 131M

Service 132

Bus Service 132

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)

Bus Service 133

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)

Bus Service 134

Service 135/Short Trip 135A

Bus Service 135

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)

Bus Service 136

Service 137 (since 2017) / Short Trip 137A

Bus Service 137

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

Bus Service 138

Service 138M

Bus Service 138M

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

Bus Service 139

Service 139M (2014 - 2022)

Operator	Year	Date	Service changes
	2014	14 September	Template:Intro BSEP
	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)

Bus Service 140

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)

Bus Service 141

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

Bus Service 142

Service 143

Bus Service 143

Service 143M

Bus Service 143M

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

Bus Service 145

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)

Bus Service 146

Service 147 / Short Trip 147A

Bus Service 147

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)

Bus Service 148

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)

Bus Service 150