History of Services 141 - 150

Service 141 (1971 - 1988)

Operator	Year	Date	Service changes
STC	1971	11 April	Introduced between Kim Keat Ave Ter and Prince Edward Ter under 1971 Bus Reorganisation.
		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.
		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.
	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	Year	Date	Service changes
Template:SBS Transit (Current)	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).

Service 141A (1971 - 1974)

Operator	Year	Date	Service changes
STC	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Finlayson Green (Loop) under 1971 Bus Reorganisation.
		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	Year	Date	Service changes
STC	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Sth Canal Ter under 1971 Bus Reorganisation.
		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)

Operator	Year	Date	Service changes
	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.
	1987	6 July	Last bus from Potong Pasir Ter extended to 2330 hrs daily.
	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.
Template:SBS Transit (Current)	2002	19 May	Amended to Toa Payoh Integrated Transport Hub.
	2003	20 June	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.

Short Trip 142A

Operator	Year	Date	Service changes
Template:SBS Transit (Current)	2018	24 December	Introduced from Toa Payoh Int to Upp Serangoon Rd (Sant Ritz) during morning peak hours on weekdays. Wheelchair-accessible at launch.

Service 143

Operator	Year	Date	Service changes
STC	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Jurong Rd 16.2 km Market Ter under 1971 Bus Reroganisation.
		2 August	Amended to Toa Payoh Town Ctr Ter.
ABS		6 December	Operations transferred to ABS.
	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.
	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 Chinatown MRT station on the North East MRT Line.
	1998	31 May	Amended to Toa Payoh Temp Int.
	1999	TBC	Serves new pair of bus stops outside and opposite West Bay Resort Condo along West Coast Rd.
		TBC	Skips abolished pair of bus stops outside and opposite Wishart Rd along Telok Blangah Rd.
	2000	TBC	Last bus from Teban Gdns Ter extended to 2400 hrs on Saturdays.
	2001	TBC	Amended to ply West Coast Rd and Penjuru Rd with the partial closure of Teban Gardens Rd.
Template:SBS Transit	2002	20 April	Amended to ply the reinstated New Bridge Rd, skipping Upp Pickering St, Sth Bridge Rd and Neil Rd.
		12 May	Integrated with Service 331 and extended to Jurong East Int.
		19 May	Amended to Toa Payoh Integrated Transport Hub.
		7 July	Skips the bus stop outside Orchard Emerald along Orchard Rd.
		TBC	Skips abolished bus stop opposite ITE Pasir Panjang along Telok Blangah Rd.
		17 November	Amended to ply Pandan Gdns.
	2004	TBC	First 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 abolished 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.
(Current)	2016	12 June	Operations transferred to Tower Transit Singapore.
	2017	26 November	Serves the bus stop after Hosp Dr along Eu Tong Sen St, skipping 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 Pandan Reservoir MRT station on the Jurong Region MRT 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.

Short Trip 143A (2002 - 2014)

Operator	Year	Date	Service changes
Template:SBS Transit	2002	12 May	Introduced from Jurong East Int to Teban Gdns Rd (Bef Hasanah Mque), operating after the last bus of Service 143 from Jurong East Int daily.
	2007	17 December	Designated wheelchair-accessible bus service (WAB).
	2011	17 December	Amended to Jurong East Temp Int.
	2014	18 May	Discontinued with the introduction of Service 143M.

Service 143M

Operator	Year	Date	Service changes
Template:SBS Transit	2014	18 May	Introduced between Jurong East Temp Int and Pandan Gdns (Loop) under the LTA's Bus Service Enhancement Programme (BSEP). Wheelchair-accessible 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 Pandan Reservoir MRT station on the Jurong Region MRT Line, skipping the bus stop before Pandan Gdns along Jurong Town Hall Rd.

Service 144 (1971 - 1982)

Operator	Year	Date	Service changes
ABS	1971	11 April	Introduced between Kim Keat Ave Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		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.
	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.
	1982	11 April	Discontinued.

Service 145

Operator	Year	Date	Service changes
STC	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Keppel Harbour Ter under 1971 Bus Reorganisation.
		2 May	Extended to Pasir Panjang Rd Ter.
		2 August	Amended to Toa Payoh Town Ctr Ter.
UBC		6 December	Operations transferred to UBC.
	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.
		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.
	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 abolished pair of 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.
Template:SBS Transit (Current)	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 abolished bus stop opposite Temenggong D Mque along Telok Blangah Rd.
	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.

Short Trip 145A

Operator	Year	Date	Service changes
Template:SBS Transit (Current)	2010	28 June	Introduced 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).

Service 146 (1971 - 1989)

Operator	Year	Date	Service changes
STC	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Keppel Harbour Ter under 1971 Bus Reorganisation.
		2 May	Extended to Pasir Panjang Rd Ter.
		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.
	1981	5 July	Amended to Kent Ridge Ter.
	1983	26 December	Amended to Toa Payoh Int and extended to Clementi Int.
	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 147

Operator	Year	Date	Service changes
ABS	1971	11 April	Introduced between Lor 6 Toa Payoh Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		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	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	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.
	1982	27 May	Amended to Buona Vista Ter.
	1983	26 December	Extended to Potong Pasir Ter.
	1984	1 July	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.
	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.
	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.
		5 December	Shortened to Clementi Int with alternate trips withdrawn under TransitLink Network Integration Exercise Phase 14.
	1994	17 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 Chinatown MRT station on the North East MRT Line.
	1999	TBC	Skips temporarily abolished 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.
	2001	18 October	Serves reinstated bus stops outside Dover Stn along Commonwealth Ave West.
Template:SBS Transit (Current)	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	20 June	Serves new pair of bus stops outside Potong Pasir Stn along Upp Serangoon Rd.
	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 Bencoolen MRT station on the Downtown MRT Line.
		26 November	Amended to Clementi Integrated Transport Hub.
	2013	29 December	Serves new bus stop outside Outram Pk Stn along New Bridge Rd.
	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 the bus stop after Hosp Dr along Eu Tong Sen St, skipping the bus stop before Hosp Dr along Kg Bahru Rd.

Short Trip 147A

Operator	Year	Date	Service changes
	2000	TBC	Introduced from Hougang Ctrl Temp Ter to Serangoon Ctrl (Blk 206) during morning peak hours daily.
Template:SBS Transit (Current)	2003	TBC	Extended to terminate at Bencoolen St (Plaza By The Pk).
	2004	TBC	Extended to terminate at New Bridge Rd (Opp Pearl's Ctr).
	2006	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 Bencoolen MRT station on the Downtown MRT Line.
	2015	TBC	Revised 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.

Service 148 (1971 - 1989)

Operator	Year	Date	Service changes
ABC	1971	11 April	Introduced between Kim Keat Ave Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		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	29 August	Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
	1982	27 May	Amended to Buona Vista Ter.
		19 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.
	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 149 (1971 - 1980)

Operator	Year	Date	Service changes
UBC	1971	11 April	Introduced between Kim Keat Ave Ter and Prince Edward Ter under 1971 Bus Reorganisation.
		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.
	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	Year	Date	Service changes
UBC	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Finlayson Green (Loop) under 1971 Bus Reorganisation.
		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	Year	Date	Service changes
UBC	1971	11 April	Introduced between Lor 1 Toa Payoh Ter and Crawford St Ter under 1971 Bus Reorganisation.
		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	Year	Date	Service changes
Template:SBS Transit (Current)	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 at launch.