History of Services 1 - 10

Service 1

Year	Date	Service Changes
1971	11 April	Introduced by ABS between Changi Point Ter and Havelock Rd Ter under 1971 Bus Reorganisation.
1973	11 March	Amended to ply Zion Rd towards Havelock Rd Ter with the partial conversion of Kim Seng Rd to one-way road.
1974	1 December	Amended to ply New Changi Rd, Bedok Plain, Bedok Heights, Upp East Coast Rd and Bedok Rd.
	8 December	Amended to skip Market St.
1975	2 February	Amended to ply Tiong Bahru Rd and the extended Zion Rd towards Havelock Rd Ter with the partial conversion of Kim Seng Rd and Outram Rd to one-way road.
	2 March	Amended to ply Sims Ave towards Changi Point Ter with the conversion of Geylang Rd to one-way road.
	25 May	Amended to ply Bedok Walk and New Changi Rd, skipping Bedok Heights and Upp East Coast Rd.
	TBC	Amended to the relocated Changi Point Ter.
	14 November	Amended to ply New Upp Changi Rd.
1979	14 October	Amended to ply Sims Ave East towards Changi Point Ter with the conversion of Changi Rd to one-way road.
	11 November	Amended to Delta Fringe Car Park.
1980	20 January	Amended to ply Spottiswoode Park Rd with the partial conversion of Cantonment Rd to one-way road.
1981	TBC	Ceased to operate on Sundays and public holidays.
	15 June	Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
1989	5 November	Withdrawn.

Service 1A

Year	Date	Service Changes
1971	1 August	Introduced by ABS between Changi Point Ter and Havelock Rd Ter.
1973	11 March	Amended to ply Zion Rd towards Havelock Rd Ter with the partial conversion of Kim Seng Rd to one-way road.
1974	3 February	Re-numbered Service 3 under 1974 Bus Rationalisation. (Related change)

Service 2

Year	Date	Service Changes
1971	11 April	Introduced by ABS between Changi Point Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
1974	1 December	Amended to ply New Changi Rd, Bedok Plain, Bedok Heights, Upp East Coast Rd and Bedok Rd.
1975	2 March	Amended to ply Sims Ave towards Changi Point Ter with the conversion of Geylang Rd to one-way road.
	25 May	Amended to ply Bedok Walk and New Changi Rd, skipping Bedok Heights and Upp East Coast Rd.
	TBC	Amended to the relocated Changi Point Ter.
	14 November	Amended to ply New Upp Changi Rd, skipping Bedok Plain and Bedok Walk.
1979	14 October	Amended to ply Sims Ave East towards Changi Point Ter with the conversion of Changi Rd to one-way road.
1980	28 December	Amended to ply Jln Bt Merah and Kg Bahru Rd in both directions, skipping Outram Rd, Tiong Bahru Rd, Henderson Rd.
1981	15 June	Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
1982	TBC	Amended to Buona Vista Ter.
1987	27 September	Amended to ply the extended Eu Tong Sen St towards Changi Village Ter to facilitate the first stage of road expansion along New Bridge Rd.
	1 November	Amended to ply Eu Tong Sen St towards Changi Village Ter to facilitate the second stage of road expansion along New Bridge Rd.
1992	29 November	Shortened to New Bridge Rd Ter under TransitLink Network Integration Exercise Phase 10.
1993	11 April	Amended to ply Jln Sultan, Victoria St, Hill St and New Bridge Rd, skipping South Bridge Rd and Neil Rd.
1994	3 July	Amended to ply Kallang Rd and Victoria St, skipping Crawford St, North Bridge Rd and Jln Sultan.
1997	7 December	Amended to ply Upp Pickering St, South Bridge Rd, Neil Rd and Kreta Ayer 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 the reinstated New Bridge Rd.
2013	29 December	Amended to ply Upp Changi Link with the partial closure of Upp Changi Rd.
2016	18 September	Operations transferred to Go-Ahead Singapore.
2018	10 March	Extended to Kg Bahru Ter with the closure of New Bridge Rd Ter.

Service 2A

Year	Date	Service Changes
1971	1 August	Introduced by ABS between Changi Point Ter and Commonwealth Ave Ter.
1974	3 February	Withdrawn under 1974 Bus Rationalisation.

Service 3

Service Gen	Year	Date	Service Changes
1st Gen (1974 - 1991)	1974	3 February	Re-numbered from Service 1A by SBS as a service between Changi Point Ter and Havelock Rd Ter. (Related change)
		1 December	Amended to ply New Changi Rd, Bedok Plain, Bedok Heights, Upp East Coast Rd and Bedok Rd.
	1975	2 February	Amended to ply Tiong Bahru Rd and the extended Zion Rd towards Havelock Rd Ter with the partial conversion of Kim Seng Rd and Outram Rd to one-way road.
		2 March	Amended to ply Sims Ave towards Changi Point Ter with the conversion of Geylang Rd to one-way road.
		25 May	Amended to ply Bedok Walk and New Changi Rd, skipping Bedok Heights and Upp East Coast Rd.
		TBC	Amended to the relocated Changi Point Ter.
	1976	15 July	Amended to ply Upp Changi Rd, skipping Telok Paku Rd and Nicoll Dr.
	1977	27 February	Shortened to Bedok South Rd Ter.
	1979	8 April	Amended to Bedok Int. At the same time, shortened to loop at New Bridge Rd and converted to a semi-express service.
		14 October	Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way road.
	1983	27 November	Integrated with Service 6 and amended to ply Kallang Rd/Crawford St and Victoria St/North Bridge Rd.
	1986	12 January	Converted to trunk service.
	1987	26 January	Extended to Jurong East Int.
		27 September	Amended to ply the extended Eu Tong Sen St towards Bedok Int to facilitate the first stage of road expansion along New Bridge Rd.
		1 November	Amended to ply Eu Tong Sen St towards Bedok 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.
	1991	6 January	Withdrawn under TransitLink Network Integration Exercise Phase 1.
2nd Gen (Since 2002)	2002	7 April	Re-introduced by SBS Transit between Tampines Int and Pasir Ris St 71 (Loop) with the integration of Services 294 and 357.
	2003	19 October	Extended to loop at Punggol Central.
		30 November	Amended to Punggol Temp Int.
	2015	12 December	Amended to ply the extended Pasir Ris Dr 8 with the permanent closure of the west ring of Pasir Ris Central.
	2016	4 September	Operated by Go-Ahead Singapore.

Service 4

Service Gen	Year	Date	Service Changes
1st Gen (1971 - 1974)	1971	11 April	Introduced by ABS between Changi Point Ter and Lloyd Leas Estate (Loop) under 1971 Bus Reorganisation.
	1974	3 February	Withdrawn under 1974 Bus Rationalisation.
2nd Gen (1979 - 1993)	1979	11 March	Re-introduced by SBS between Bedok Int and Lor 1 Geylang (Loop).
		14 October	Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way road.
	1980	TBC	Extended to loop at Moulmein Rd.
	1988	31 July	Extended to St. Michael's Ter.
	1990	10 March	Integrated with Service 19 and extended to Pasir Ris Int.
	1992	29 November	Shortened to Tampines Int under TransitLink Network Integration Exercise Phase 10.
	1993	23 May	Integrated with Services 21 and 67 and withdrawn under TransitLink Network Integration Exercise Phase 13.
3rd Gen (Since 2013)	2013	17 March	Re-introduced by SBS Transit between Tampines Int and Changi North Way (Loop) under the Bus Service Enhancement Programme (BSEP).

Service 5

Service Gen	Year	Date	Service Changes
1st Gen (1971 - 1999)	1971	11 April	Introduced by ABC between Bedok Rd Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
	1972	11 June	Amended to ply the extended Upp Cross St with the partial conversion of Havelock Rd to one-way road, skipping New Bridge Rd.
	1973	TBC	Extended to Bt Timah Ter.
	1974	3 February	Shortened to Chai Chee Ter under 1974 Bus Rationalisation.
	1975	2 March	Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way road.
	1977	17 October	Shortened to Geylang Fringe Car Park and amended to ply Lavender St, Kallang Bahru, Boon Keng Rd and Lor 1 Geylang.
	1979	30 December	Amended to ply Jln Anak Bt towards Geylang Fringe Car Park with the partial conversion of Upp Bt Timah Rd to one-way road.
	1986	1 June	Extended to Zhenghua Ter.
	1987	27 September	Amended to ply the extended Eu Tong Sen St towards Lor 1 Geylang Ter to facilitate the first stage of road expansion along New Bridge Rd.
		11 October	Amended to Bt Panjang Ter.
		1 November	Amended to ply Eu Tong Sen St towards Lor 1 Geylang Ter to facilitate the second stage of road expansion along New Bridge Rd.
	1992	29 March	Amended to ply Holland Ave, C'wealth Ave, Margaret Dr, Alexandra Rd, Lower Delta Rd, Jln Bt Merah, Kg Bahru Rd and Eu Tong Sen St/New Bridge Rd under TransitLink Network Integration Exercise Phase 6.
	1993	11 April	Amended to ply Jln Sultan, Victoria St, Hill St and New Bridge Rd, skipping South Bridge Rd and Upp Cross St.
	1994	3 July	Amended to ply Kallang Rd and Victoria St, skipping Crawford St, North Bridge Rd and Jln Sultan.
	1995	17 September	Operations transferred to TIBS.
	1997	7 December	Amended to ply Upp Pickering St, South 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	26 December	Withdrawn under Bukit Panjang LRT Rationalisation.
2nd Gen (Since 2007)	2007	11 March	Re-introduced by SBS Transit between Pasir Ris Int and Bt Merah Int.
	2011	28 August	Amended to ply Jln Tenaga, Bedok Reservoir Rd and Jln Damai with the partial closure of Kaki Bt Ave 1 to facilitate the construction of Kaki Bukit MRT station on the Downtown MRT Line.
	2016	24 April	Amended to ply the reinstated Kaki Bt Ave 1.

Service 6

Service Gen	Year	Date	Service Changes
1st Gen (1977 - 1983)	1977	11 July	Introduced by SBS between Chai Chee Ter and North Bridge Rd (Loop) as a semi-express service.
	1979	25 February	Amended to Bedok Int.
		14 October	Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way road.
	1983	27 November	Integrated with Service 3 and withdrawn.
2nd Gen (Since 1993)	1993	25 October	Re-introduced by SBS between Pasir Ris Int and Loyang Cres (Loop) as a peak hour service on weekdays and Saturdays only.
	1994	24 October	Converted to day service.
	2004	20 December	Amended to ply Loyang Way and Loyang Ave towards Pasir Ris Int.
	2016	18 September	Operations transferred to Go-Ahead Singapore.

Service 7

Year	Date	Service Changes
1979	11 March	Introduced by SBS between Bedok Int and Holland Rd Fringe Car Park (Loop) as a semi-express service, replacing Blue Arrow Service 307.
1983	TBC	Integrated with Service 191 and extended to Clementi Int.
1985	6 January	Extended to Jurong East Central Ter.
	30 June	Amended to Jurong East Int.
	29 August	Converted to trunk service.
1989	5 November	Amended to ply Mountbatten Rd, Geylang Rd, Kallang Rd/Crawford St and Victoria St/North Bridge Rd, skipping Nicoll Highway.
1991	7 April	Shortened to Clementi Int and amended to ply Clementi Ave 5 under TransitLink Network Integration Exercise Phase 3, skipping Commonwealth Ave West and Clementi Ave 2.
	28 April	Amended to ply Clementi Ave 5 towards Clementi Int under TransitLink Network Integration Exercise Phase 4.
1992	TBC	Amended to ply Orchard Link, skipping Grange Rd.
2005	5 June	Amended to ply Sims Ave and Sims Way with the partial closure of southbound Mountbatten Rd.
	2 July	Amended to ply Sims Way and Geylang Rd with the partial closure of northbound Mountbatten Rd and amended to ply Grange Rd with the partial closure of Somerset Rd.
2006	29 October	Amended to Clementi Temp Int.
2011	19 November	Amended to Bedok Temp Int.
	26 November	Amended to Clementi Integrated Transport Hub.
2014	30 November	Amended to Bedok Integrated Transport Hub.

Service 8

Service Gen	Year	Date	Service Changes
1st Gen (1979 - 1989)	1979	26 February	Introduced by SBS between Bedok Int and Shenton Way (Loop) as a semi-express service, operating on weekdays and Saturdays only.
		14 October	Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way road.
	1983	TBC	Amended to ply Bedok South Rd, Bedok South Ave 1 and ECP, skipping Connaught Dr, Collyer Quay, Raffles Quay and Shenton Way.
	1986	30 November	Extended to loop at Marina Centre.
	1989	6 November	Withdrawn.
2nd Gen (Since 1990)	1990	1 March	Re-introduced by SBS between Pasir Ris Int and Toa Payoh Int.
	1992	29 November	Shortened to Tampines Int under TransitLink Network Integration Exercise Phase 10.
	1994	5 March	Amended to ply Lor 6 Toa Payoh towards Toa Payoh Int.
	1995	18 September	Amended to ply Tampines Ave 1, Tampines Ave 10 and Bedok North Rd with the opening of Temasek Polytechnic.
	1998	31 May	Amended to Toa Payoh Temp Int.
	2002	19 May	Amended to Toa Payoh Integrated Transport Hub.
	2011	4 September	Amended to skip Bendemeer Rd, Whampoa North and Serangoon Rd towards Toa Payoh Integrated Transport Hub.

Service 9

Year	Date	Service Changes
1979	9 April	Introduced by SBS between Geylang Fringe Car Park and Changi Point Ter, operating on weekdays and Saturdays only.
	14 October	Amended to ply Sims Ave East towards Changi Point Ter with the conversion of Changi Rd to one-way road.
1981	TBC	Enhanced to operate on Sundays and public holidays.
	15 June	Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
1983	25 June	Integrated with Services 391 and 395 and extended to loop at Changi Airport Cargo Complex under Changi Airport Bus Plan 1983.
1985	15 December	Amended to ply Loyang Ave, skipping Loyang Way.
1988	10 April	Amended to ply Upp Changi Rd East, Simei Rd, Tampines Ave 2 and Tampines Ave 7, skipping Bedok Rd and Upp Changi Rd.
1992	29 November	Shortened to Bedok Int under TransitLink Network Integration Exercise Phase 10.
1995	15 January	Amended to ply Bedok Rd, Upp Changi Rd, Simei Ave and Simei St 3, skipping Upp Changi Rd East.
2011	19 November	Amended to Bedok Temp Int.
2014	30 November	Amended to Bedok Integrated Transport Hub.

Service 10

Year	Date	Service Changes
1971	11 April	Introduced by ABS between Bedok Rd Ter and Prince Edward Rd Ter under 1971 Bus Reorganisation.
	16 June	Extended to Shipyard Rd Ter.
1974	TBC	Amended to Upp Changi Rd 13.3km Ter.
	8 December	Amended to skip Market St.
1978	1 June	Amended to Jurong Int.
1979	TBC	Relocated to Upp Changi Rd 15.5km Ter.
1980	15 June	Amended to Somapah Int.
1984	27 April	Extended to Tampines Ave 5 Ter.
1987	29 November	Amended to Tampines Int.
1990	1 July	Shortened to Clementi Int with the opening of Boon Lay Int.
1992	28 June	Amended to ply Tg Katong Rd, Dunman Rd and Old Airport Rd under TransitLink Network Integration Exercise Phase 8.
1999	7 March	Shortened to Kent Ridge Ter with the introduction of Service 188.
2000	TBC	Amended to ply Esplanade Dr, skipping Connaught Dr/Empress Pl.
2004	20 April	Amended to ply Mountbatten Rd, Geylang Rd, Kallang Rd, Victoria St, Jln Sultan and Beach Rd to facilitate the reinstatement works for the collapsed Nicoll Highway.
	6 December	Amended to ply the reinstated Nicoll Highway.
2006	19 March	Amended to ply Cassia Link, Guillemard Rd and Guillemard Camp Rd with the partial closure of Old Airport Rd and Dunman Rd to facilitate the construction of Dakota MRT station on the Circle MRT Line.
2008	29 December	Amended to ply the reinstated Old Airport Rd and Dunman Rd.

Service 11

Service Gen	Year	Date	Service Changes
1st Gen (1971 - 1988)	1971	11 April	Introduced by ABS between Bedok Rd Ter and Tg Pagar Rd Ter under 1971 Bus Reorganisation.
	1974	3 February	Amended to Upp Changi Rd 13.3km Ter under 1974 Bus Rationalisation.
	1975	2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Upp Changi Rd 13.3 km Ter with the conversion of Geylang Rd to one-way road.
	1977	23 October	Amended to New Bridge Rd Ter.
	1979	TBC	Relocated to Upp Changi Rd 15.5km Ter.
	1980	15 June	Amended to Somapah Int.
	1987	6 June	Amended to the relocated New Bridge Rd Ter.
		27 September	Amended to ply the extended Eu Tong Sen St towards Somapah Ter to facilitate the first stage of road expansion along New Bridge Rd.
		1 November	Amended to ply Eu Tong Sen St towards Somapah Ter to facilitate the second stage of road expansion along New Bridge Rd.
	1988	23 October	Integrated with Service 12 and withdrawn.
2nd Gen (Since 1990)	1990	14 April	Re-introduced by SBS between Lor 1 Geylang Ter and Stadium Blvd (Loop).
	1994	12 June	Amended to ply Stadium Rd before plying Stadium Blvd.
	2002	8 February	Amended to ply Stadium Walk with the partial closure of Stadium Blvd to facilitate the construction of Stadium MRT station on the Circle MRT Line.
	2005	5 June	Amended to ply Sims Ave and Sims Way with the partial closure of southbound Mountbatten Rd.
		2 July	Amended to ply Sims Way and Geylang Rd with the partial closure of northbound Mountbatten Rd.
	2006	18 February	Amended to ply Stadium Cres with the full closure of Stadium Blvd to facilitate the construction of Stadium MRT station on the Circle MRT Line.
	2010	29 September	Amended to ply Mountbatten Rd and Stadium Blvd with the closure of Stadium Rd to facilitate the construction of the Singapore Sports Hub.
	2014	8 June	Extended to loop at Rhu Cross under the Bus Service Enhancement Programme (BSEP).

Service 12

Year	Date	Service Changes
1971	11 April	Introduced by ABS between Bedok Rd Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
1974	3 February	Amended to Upp Changi Rd 13.3km Ter under 1974 Bus Rationalisation.
1975	2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Upp Changi Rd 13.3 km Ter with the conversion of Geylang Rd to one-way road.
	11 December	Amended to ply New Changi Rd, Bedok Walk, Bedok Plain and Bedok Highway.
1979	TBC	Relocated to Upp Changi Rd 15.5km.
1980	15 June	Amended to Somapah Int.
	28 December	Amended to ply Upp Changi Rd East, skipping Upp Changi Rd.
1982	TBC	Amended to Buona Vista Ter.
1987	27 September	Amended to ply South Bridge Rd and Eu Tong Sen St, skipping Upp Circular Rd.
1988	23 October	Integrated with Service 11 and extended to Pasir Ris Ter and amended to New Bridge Rd Ter.
1989	10 December	Amended to Pasir Ris Int.
1993	11 April	Amended to ply Jln Sultan, Victoria St, Hill St and New Bridge Rd, skipping South Bridge Rd and Upp Cross St.
1994	3 July	Amended to ply Kallang Rd and Victoria St, skipping Crawford St, North Bridge Rd and Jln Sultan.
1997	7 December	Amended to ply Upp Pickering St, South Bridge Rd, Neil Rd and Kreta Ayer 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 the reinstated New Bridge Rd.
2005	5 June	Amended to ply Sims Ave and Sims Way with the partial closure of southbound Mountbatten Rd.
	2 July	Amended to ply Sims Way and Geylang Rd with the partial closure of northbound Mountbatten Rd.
2016	18 September	Operations transferred to Go-Ahead Singapore.
2018	10 March	Extended to Kg Bahru Ter with the closure of New Bridge Rd Ter.

Service 12A

Year	Date	Service Changes
1979	31 December	Introduced by SBS between Bedok South Ave 3 and North Bridge Rd (Loop) as a peak hour variant of Service 12 on weekdays.
1984	2 September	Withdrawn.

Service 13

Year	Date	Service Changes
1971	11 April	Introduced by ABS between Bedok Rd Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
	9 May	Amended to ply Upp Changi Rd, Changi Rd, Geylang Rd, Kallang Rd, Crawford St, North Bridge Rd and Stamford Rd.
1974	3 February	Amended to Upp Changi Rd 13.3km Ter under 1974 Bus Rationalisation.
	24 February	Amended to ply Grange Rd and Orchard Blvd with the conversion of Orchard Rd to one-way road, skipping Orchard Rd and Tanglin Rd.
	1 December	Shortened to Upp Changi Rd Track 6 Ter.
1975	2 March	Amended to ply Sims Ave towards Upp Changi Rd 13.3 km Ter with the conversion of Geylang Rd to one-way road.
	16 November	Amended to Chai Chee Ter.
1977	6 June	Extended to Ghim Moh Ter.
1979	14 October	Amended to ply Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way road.
1985	8 September	Extended to Bedok Int with the closure of Chai Chee Ter.
1987	12 April	Shortened to Eunos Ter.
1989	5 November	Amended to Yio Chu Kang Ter.
	10 December	Amended to Eunos Int.
1990	2 September	Amended to ply Bishan St 22 and Marymount Rd, skipping Ang Mo Kio Ave 1.
1998	TBC	Extended to Marine Parade Ter.
2001	16 September	Amended to loop at Siglap Rd with the closure of Marine Parade Ter.
	9 December	Extended to Upp East Coast Ter.

Service 13A

Year	Date	Service Changes
1971	11 April	Introduced by ABS between Bedok Rd Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
1974	3 February	Shortened to loop at Mei Chin Rd and re-numbered Service 14 under 1974 Bus Rationalisation. (Related change)

Service 14

Year	Date	Service Changes
1974	3 February	Re-numbered from Service 13A by SBS as a service between Bedok Rd Ter and Mei Chin Rd (Loop) under 1974 Bus Rationalisation. (Related change)
	24 February	Amended to ply Grange Rd and Orchard Blvd with the conversion of Orchard Rd to one-way road, skipping Orchard Rd and Tanglin Rd.
	TBC	Amended to Upp Changi Rd 8¼ ms (13.3 km) Ter.
1975	2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Upp Changi Rd 13.3 km Ter with the conversion of Geylang Rd to one-way road.
1978	4 September	Amended to ply Nicoll Highway, skipping Kallang Rd.
1979	TBC	Relocated to Upp Changi Rd 15.5km Ter.
	2 December	Extended to Jln Bt Merah Ter and amended to ply Napier Rd, Holland Rd and Queensway.
	23 December	Amended to Bt Merah Central Ter.
1980	15 June	Amended to Somapah Int.
	28 September	Amended to Bt Merah Int.
1986	16 March	Amended to ply Stadium Walk.
	13 April	Amended to ply Stadium Rd, skipping Stadium Walk.
1989	5 November	Extended to Changi Village Ter.
1991	20 January	Shortened to Bedok Int under TransitLink Network Integration Exercise Phase 2.
1992	29 March	Amended to ply Bt Merah Central.
	TBC	Amended to ply Orchard Link, skipping Grange Rd.
1993	23 May	Integrated with Service 92 and extended to Clementi Int under TransitLink Network Integration Exercise Phase 13.
2004	20 April	Amended to ply Mountbatten Rd, Geylang Rd, Kallang Rd, Victoria St, Jln Sultan and Beach Rd to facilitate the reinstatement works for the collapsed Nicoll Highway.
	6 December	Amended to ply the reinstated Nicoll Highway.
2005	2 July	Amended to ply Grange Rd with the partial closure of Somerset Rd.
2006	29 October	Amended to Clementi Temp Int.
2011	19 November	Amended to Bedok Temp Int.
	26 November	Amended to Clementi Integrated Transport Hub.
2014	30 November	Amended to Bedok Integrated Transport Hub.

Service 15

Service Gen	Year	Date	Service Changes
1st Gen (1975 - 1984)	1975	22 June	Introduced by SBS between Marine Terrace Ter and Prince Edward Rd Ter.
	1976	4 July	Extended to loop at Shenton Way.
	1981	5 July	Amended to Marine Parade Ter.
	1984	16 September	Integrated with Service 196 and withdrawn.
2nd Gen (Since 1995)	1995	18 September	Re-introduced by SBS between Pasir Ris Int and Eunos Int with the opening of Temasek Polytechnic.
	1997	5 October	Integrated with Service M4 and extended to loop at Marine Parade Rd.
	1998	TBC	Amended to skip Marine Cres/Terrace with the route extension of Service 13.
	2011	28 August	Amended to ply Jln Tenaga, Bedok Reservoir Rd and Jln Damai with the partial closure of Kaki Bt Ave 1 to facilitate the construction of Kaki Bukit MRT station on the Downtown MRT Line.
	2016	24 April	Amended to ply the reinstated Kaki Bt Ave 1.
		18 September	Operations transferred to Go-Ahead Singapore.

Service 16

Year	Date	Service Changes
1976	2 May	Introduced by SBS between Marine Terrace Ter and Telok Blangah Heights Ter.
1981	15 February	Amended to Bt Merah Int.
	5 July	Amended to Marine Parade Ter.
1983	TBC	Amended to ply Stadium Walk after 1930 hours daily.
1986	13 April	Amended to ply Stadium Rd, skipping Stadium Walk during the evening diversion into Kallang Park/National Stadium.
1987	23 February	Amended to ply Stadium Rd after 1845 hours daily.
1992	TBC	Amended to ply Orchard Link, skipping Grange Rd.
1993	23 May	Amended to ply Stadium Rd throughout the day under TransitLink Network Integration Exercise Phase 13.
	5 December	Integrated with Service 149, extended to loop at Changi Airport and amended to ply Zion Rd/Kim Seng Rd, Outram Rd and Tiong Bahru Rd under TransitLink Network Integration Exercise Phase 14, skipping River Valley Rd, Delta Rd and Lower Delta Rd.
1996	TBC	Amended to terminate at Changi Airport.
1998	6 September	Shortened to Marine Parade Ter with the conversion of Service 36 to a full day trunk service.
2001	16 September	Amended to loop at Siglap Rd with the closure of Marine Parade Ter.
2002	8 February	Amended to ply Stadium Walk and Stadium Cres with the partial closure of Stadium Blvd to facilitate the construction of Stadium MRT station on the Circle MRT Line.
2004	20 April	Amended to ply Mountbatten Rd, Geylang Rd, Kallang Rd, Victoria St, Jln Sultan and Beach Rd to facilitate the reinstatement works for the collapsed Nicoll Highway.
	6 December	Amended to ply the reinstated Nicoll Highway.
2005	2 July	Amended to ply Grange Rd with the partial closure of Somerset Rd.
2006	18 February	Amended to ply Stadium Cres with the full closure of Stadium Blvd to facilitate the construction of Stadium MRT station on the Circle MRT Line.
	19 March	Amended to ply Cassia Link, Guillemard Rd and Guillemard Camp Rd with the partial closure of Old Airport Rd and Dunman Rd to facilitate the construction of Dakota MRT station on the Circle MRT Line.
2007	19 August	Extended to Bedok Int.
2008	29 December	Amended to ply the reinstated Old Airport Rd and Dunman Rd.
2010	29 September	Amended to ply Mountbatten Rd with the closure of Stadium Rd/Stadium Dr to facilitate the construction of the Singapore Sports Hub.
2011	19 November	Amended to Bedok Temp Int.
2014	30 November	Amended to Bedok Integrated Transport Hub.
2017	9 April	Amended to ply Still Rd South and East Coast Rd to facilitate the construction of the Thomson-East Coast MRT Line.
	12 November	Amended to ply the reinstated Marine Parade Rd and Joo Chiat Rd.

Service 16E

Year	Date	Service Changes
1994	31 January	Introduced by SBS between Bt Merah Int and Changi Airport PTB 2 as a peak hour uni-directional semi-express service on weekdays.
1997	1 December	Re-numbered Service 36. (Related change)

Service 17

Service Gen	Year	Date	Service Changes
1st Gen (1981 - 1984)	1981	22 February	Introduced by SBS between Changi Point Ter and Prince Edward Rd Ter, operating on weekdays and Saturdays only.
		15 June	Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
	1984	8 April	Withdrawn.
2nd Gen (Since 1993)	1993	4 April	Re-introduced by SBS between Pasir Ris Int and Bedok Int under TransitLink Network Integration Exercise Phase 12.
	2002	TBC	Amended to loop at Bedok Int from Pasir Ris Int.
	2011	19 November	Amended to loop at Bedok Temp Int.
	2014	30 November	Amended to loop at Bedok Integrated Transport Hub.
	2016	18 September	Operations transferred to Go-Ahead Singapore and reverted to bi-directional service.

Service 17A

Year	Date	Service Changes
2014	16 November	Converted from a short working trip by SBS Transit between Bedok North Depot and Bedok Temp Int (Loop) under the Bus Service Enhancement Programme (BSEP).
	30 November	Amended to loop at Bedok Integrated Transport Hub.
2016	18 September	Operations transferred to Go-Ahead Singapore and reverted to a short working trip from Bedok Integrated Transport Hub to Bedok North Ave 4.

Service 18

Year	Date	Service Changes
1984	25 August	Introduced by SBS between Bedok Int and Tampines Ave 2 (Loop).
1985	3 November	Amended to loop at Tampines St 22.
1987	29 November	Extended to start from Tampines Int and loop at Bedok Int, skipping Tampines St 22.
2011	19 November	Amended to loop at Bedok Temp Int and amended to ply Bedok North Rd and Bedok North Ave 2.
2014	30 November	Amended to loop at Bedok Integrated Transport Hub.
2016	18 December	Amended to Tampines Concourse Int.
2017	21 October	Amended to ply Tampines Ave 7, St 34, St 33 and St 32.

Service 19

Service Gen	Year	Date	Service Changes
1st Gen (1979 - 1981)	1979	TBC	Introduced by SBS between Siglap Rd and Prince Edward Rd Ter.
	1980	12 May	Converted to peak-hour one-directional service on weekdays and Saturdays only.
	1981	11 August	Withdrawn.
2nd Gen (1988 - 1990)	1988	19 June	Re-introduced by SBS between Bedok Int and Pasir Ris Dr 6 (Loop).
	1989	10 December	Amended to Pasir Ris Int.
	1990	10 March	Integrated with Service 4 and withdrawn.
3rd Gen (Since 1993)	1993	TBC	Re-introduced by SBS between Tampines Int and Changi Airport Cargo Complex (Loop) as a day service, replacing the deleted sectors of Service 29.

Service 20

Service Gen	Year	Date	Service Changes
1st Gen (1971 - 1989)	1971	11 April	Introduced by STC between Fidelio St Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		6 December	Operations transferred to ABS.
	1973	1 July	Amended to Chai Chee Ter.
	1974	8 December	Amended to skip Market St.
	1975	2 March	Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way road.
	1977	7 March	Extended to Ghim Moh Ter.
	1978	15 January	Amended to ply Jln Sultan, skipping Sumbawa Rd.
	1979	14 October	Amended to ply Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way road.
	1985	8 September	Extended to Bedok Int with the closure of Chai Chee Ter.
	1989	5 November	Integrated with Service 100 and withdrawn.
2nd Gen (1994 - 2000)	1994	TBC	Re-introduced by SBS between Sims Pl Ter and St. Wilfred Rd (Loop).
	2000	27 November	Integrated with Service 125 and withdrawn.
3rd Gen (Since 2013)	2013	9 June	Re-introduced by SBS Transit between Tampines Int and Changi Business Park Central 2 (Loop) under the Bus Service Enhancement Programme (BSEP).
	2017	21 October	Amended to ply Somapah Rd and Changi South Ave 1, skipping Upp Changi Rd East and Xilin Ave.