History of Services 1 - 50

Service 1 (1971 - 1989)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Changi Point ↔ Delta Circus	1971	11 April	Introduced between Changi Pt Ter and Delta Circus Ter under 1971 Bus Reorganisation.
		1973	11 March	Amended to ply Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd to one-way traffic.
			1 July	Operations transferred to Singapore Bus Services.
		1974	1 December	Amended to ply New Upp Changi Rd, Bedok Plain, Bedok Hts, Upp East Coast Rd and Bedok Rd.
			8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1975	2 February	Amended to ply Tiong Bahru Rd and the extended Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd and Outram Rd to one-way traffic.
			2 March	Amended to ply Sims Ave towards Changi Pt Ter with the conversion of Geylang Rd to one-way traffic.
			25 May	Amended to ply Bedok Wk and New Upp Changi Rd, skipping Bedok Hts and Upp East Coast Rd.
			TBC	Amended to new Changi Pt Ter.
			14 November	Amended to ply New Upp Changi Rd, skipping Bedok Plain and Bedok Wk.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
		1979	11 February	Amended to ply the extended Shenton Way towards Delta Circus Ter, skipping Parsi Rd and Anson Rd.
			14 October	Amended to ply Sims Ave East towards Changi Pt Ter with the conversion of Changi Rd to one-way traffic.
	Changi Point ↔ Delta Fringe Car Park		11 November	Amended to Delta Fringe Car Pk.
		1980	20 January	Amended to ply Spottiswoode Pk Rd with the partial conversion of Cantonment Rd to one-way traffic.
		1981	15 June	Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
			11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
			8 November	Revised to operate on weekdays and Saturdays only.
		1987	6 April	Skips removed bus stop before College Rd along Outram Rd.
		1989	5 November	Discontinued.

Service 1A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Changi Point ↔ Delta Circus	1971	1 August	Introduced between Changi Pt Ter and Delta Circus Ter.
		1973	11 March	Amended to ply Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd to one-way traffic.
			1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Re-numbered Service 3 under 1974 Bus Rationalisation.

Service 2 (Current)

History of Service 2

Service 2A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Changi Point ↔ Commonwealth Avenue	1971	1 August	Introduced between Changi Pt Ter and Commonwealth Ave Ter.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Discontinued under 1974 Bus Rationalisation.

Service 3

1st Generation (1974 - 1991)

Operator	Route	Year	Date	Service changes
	Changi Point ↔ Delta Circus	1974	3 February	Re-numbered from Service 1A as a service between Changi Pt Ter and Delta Circus Ter.
			1 December	Amended to ply New Upp Changi Rd, Bedok Plain, Bedok Hts, Upp East Coast Rd and Bedok Rd.
		1975	2 February	Amended to ply Tiong Bahru Rd and the extended Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd and Outram Rd to one-way traffic.
			2 March	Amended to ply Sims Ave towards Changi Pt Ter with the conversion of Geylang Rd to one-way traffic.
			25 May	Amended to ply Bedok Wk and New Upp Changi Rd, skipping Bedok Hts and Upp East Coast Rd.
			TBC	Amended to new Changi Pt Ter.
		1976	15 July	Amended to ply Upp Changi Rd, skipping Telok Paku Rd and Nicoll Dr.
	Bedok South Rd ↺ New Bridge Rd		2 August	Shortened to start from Bedok Sth Rd Ter and loop at New Bridge Rd.
	Bedok ↺ New Bridge Rd	1979	8 April	Amended to Bedok Int 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 traffic.
		1983	27 November	Integrated with Service 6 and amended to ply Kallang Rd/Crawford St and Victoria St/Nth Bridge Rd.
		1986	12 January	Converted to trunk service.
			6 July	Serves the bus stop outside Blk 414 along Sims Ave, skipping the bus stop outside Blk 416.
	Bedok ↔ Jurong East	1987	1 February	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.
		1989	19 February	Serves new bus stop outside Blk 135 along Jurong East St 13.
			19 November	Serves new bus stop outside Kallang Stn along Sims Ave.
		1990	22 July	Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
		1991	6 January	Discontinued under TransitLink Network Integration Exercise Phase 1.

2nd Generation (Current)

History of Service 3

Service 4

1st Generation (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Changi Point ↺ Lloyd Leas Estate	1971	11 April	Introduced between Changi Pt Ter and Lloyd Leas Est (Loop) under 1971 Bus Reorganisation.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Discontinued under 1974 Bus Rationalisation.

2nd Generation (1979 - 1993)

Operator	Route	Year	Date	Service changes
	Bedok ↺ Lor 1 Geylang	1979	11 March	Introduced 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 traffic.
	Bedok ↺ Moulmein Rd	1980	11 February	Extended to loop at Moulmein Rd.
	Bedok ↔ St. Michael's	1988	31 July	Extended to St. Michael's Ter.
		1989	19 November	Serves new bus stop outside Kallang Stn along Sims Ave.
	Pasir Ris ↔ St. Michael's	1990	11 March	Integrated with Service 19 and extended to Pasir Ris Int.
	Tampines ↔ St. Michael's	1992	29 November	Shortened to Tampines Int under TransitLink Network Integration Exercise Phase 10.
		1993	23 May	Integrated with Services 21 and 67 and discontinued under TransitLink Network Integration Exercise Phase 13.

3rd Generation (Current)

History of Service 4

Service 5

1st Generation (1971 - 1999)

Operator	Route	Year	Date	Service changes
Amalgamated Bus Company	Upper Changi Road 8¼ ms ↔ Commonwealth Ave	1971	11 April	Introduced between Upp Changi Rd 8¼ m.s. Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
			28 September	Amended to ply the extended Ganges Ave towards Upp Changi Rd 8¼ m.s. 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.
	Upp Changi Rd 8¼ ms ↔ Bukit Timah	1973	TBC	Extended to Bt Timah Ter.
		1973	1 July	Operations transferred to Singapore Bus Services.
	Chai Chee ↔ Bukit Timah	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 traffic.
	Lor 1 Geylang ↔ Bukit Timah	1977	17 October	Shortened to Geylang Fringe Car Pk and amended to ply Lavender St, Kallang Bahru, Boon Keng Rd and Lor 1 Geylang.
		1979	11 November	Amended to ply Ganges Ave towards Bt Timah Ter with the realignment of Delta Circus.
			30 December	Amended to ply Jln Anak Bt towards Geylang Fringe Car Pk with the partial conversion of Upp Bt Timah Rd to one-way traffic.
		1981	15 November	Amended to use new u-turn near Eng Neo Ave towards Geylang Fringe Car Pk, skipping the bus stop outside Turf City along Dunearn Rd and the bus stop after Third Ave along Bt Timah Rd.
	Lor 1 Geylang ↔ Bukit Panjang	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.
			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.
			13 December	Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
		1989	25 June	Skips the bus stop after Tan Boon Chong Ave along Holland Rd.
			19 November	Serves new bus stop outside Kallang Stn along Sims Ave.
		1990	22 July	Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
		1992	29 March	Amended to ply Holland Ave, Commonwealth 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, skipping Queensway, Commonwealth Ave, Alexandra Rd, Ganges Ave and Havelock Rd.
		1993	11 April	Amended to ply Jln Sultan, Victoria St, Hill St and New Bridge Rd, skipping Sth Bridge Rd and Upp Cross St.
		1994	3 July	Amended to ply Kallang Rd and Victoria St, skipping Crawford St, Nth Bridge Rd and Jln Sultan.
		1995	17 September	Operations transferred to Trans Island Bus Services.
		1997	TBC	Serves additional bus stop after Jln Bt Merah along Kg Bahru Rd.
			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 NE4DT19Chinatown station on the North East Line.
			8 December	Skips the bus stop outside Kallang Stn along Sims Ave.
		1999	26 December	Discontinued under Bukit Panjang LRT Rationalisation.

2nd Generation (Current)

History of Service 5

Service 6

1st Generation (1977 - 1983)

Operator	Route	Year	Date	Service changes
	Chai Chee ↺ North Bridge Rd	1977	11 July	Introduced between Chai Chee Ter and Nth Bridge Rd (Loop) as a semi-express service.
	Bedok ↺ North Bridge Rd	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 traffic.
		1983	27 November	Integrated with Service 3 and discontinued.

2nd Generation (Current)

History of Service 6

Service 7 (Current)

History of Service 7

Service 8

1st Generation (1979 - 1989)

Operator	Route	Year	Date	Service changes
	Bedok ↺ Shenton Way	1979	26 February	Introduced 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 traffic.
		1981	11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
	Bedok ↺ Robinson Rd	1982	5 April	Amended to ply Bedok Sth Rd, Bedok Sth Ave 1 and ECP, skipping Connaught Dr, Collyer Quay, Raffles Quay and Shenton Way.
	Bedok ↺ Marina Ctr	1986	30 November	Extended to loop at Marina Ctr.
		1989	6 November	Discontinued.

2nd Generation (Current)

History of Service 8

Service 9 (Current)

History of Service 9

Service 10 (Current)

History of Service 10

Service 11

1st Generation (1971 - 1988)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Bedok Rd ↔ Tg Pagar Rd	1971	11 April	Introduced between Bedok Rd Ter and Tg Pagar Ter under 1971 Bus Reorganisation.
		1973	1 July	Operations transferred to Singapore Bus Services.
	Upp Changi Rd 8¼ ms ↔ Tg Pagar Rd	1974	3 February	Amended to Upp Changi Rd 8¼ ms (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 traffic.
	Upp Changi Rd 8¼ ms ↔ New Bridge Rd	1979	28 May	Amended to New Bridge Rd Ter.
			TBC	Relocated to Upp Changi Rd 15.5km Ter.
	Somapah Depot ↔ New Bridge Rd	1980	16 June	Amended to Somapah Depot.
	Somapah ↔ New Bridge Rd	1981	28 June	Amended to Somapah Int.
		1986	7 December	Serves new bus stop before Bedok Sth Ave 3 along Upp East Coast Rd.
		1987	6 June	Amended to 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 discontinued.

2nd Generation (Current)

History of Service 11

Service 12 (Current)

History of Service 12

Service 13 (Current)

History of Service 13

Service 13A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Bedok Road ↔ Commonwealth Avenue	1971	11 April	Introduced between Bedok Rd Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Re-numbered Service 14 under 1974 Bus Rationalisation.

Service 14 (Current)

History of Service 14

Service 15

1st Generation (1975 - 1984)

Operator	Route	Year	Date	Service changes
	Marine Terrace ↔ Prince Edward	1975	22 June	Introduced between Marine Terr Ter and Prince Edward Ter.
		1976	15 February	Serves new staggered bus stop outside Overseas Union Finance along Robinson Rd.
			14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
	Marine Terrace ↺ Shenton Way		4 July	Extended to loop at Shenton Way from Marine Terr Ter.
		1977	27 March	Amended to ply Marine Terr and Marine Cres towards Shenton Way, and amended to ply Marine Cres and Marine Parade Rd towards Marine Terr Ter with the relocation of Marine Terr Ter opposite Blk 52.
		1978	13 November	Amended to ply Marine Parade Rd and Amber Rd, skipping Joo Chiat Rd and East Coast Rd.
		1979	11 February	Amended to ply the extended Shenton Way, Keppel Rd and Anson Rd, skipping Parsi Rd.
	Marine Parade ↺ Shenton Way	1981	5 July	Amended to Marine Parade Ter.
			11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
		1984	16 September	Integrated with Service 196 and discontinued.

2nd Generation (Current)

History of Service 14

Service 15 (Current)

History of Service 15

Service 16 (Current)

History of Service 16

Service 16E (1994 - 1997)

Operator	Route	Year	Date	Service changes
	AMBukit Merah → Changi Airport PMChangi Airport → Bukit Merah	1994	31 January	Introduced between Bt Merah Int and Changi Airport as a peak hour uni-directional semi-express service on weekdays.
		1997	1 December	Re-numbered Service 36.

Service 17

1st Generation (1981 - 1984)

Operator	Route	Year	Date	Service changes
	Changi Point ↔ Prince Edward	1981	2 February	Introduced between Changi Pt Ter and Prince Edward 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	Discontinued.

2nd Generation (Current)

History of Service 17

Service 18 (Current)

History of Service 18

Service 19

1st Generation (1979 - 1981)

Operator	Route	Year	Date	Service changes
	Siglap Rd ↔ Prince Edward	1979	TBC	Introduced between Siglap Rd and Prince Edward Ter.
	AMSiglap Rd → Prince Edward PMPrince Edward → Siglap Rd	1980	12 May	Converted to peak-hour one-directional service on weekdays and Saturdays only.
		1981	11 August	Discontinued.

2nd Generation (1988 - 1990)

Operator	Route	Year	Date	Service changes
	Bedok ↺ Pasir Ris Dr 6	1988	19 June	Introduced between Bedok Int and Pasir Ris Dr 6 (Loop).
	Bedok ↔ Pasir Ris	1989	10 December	Amended to Pasir Ris Int.
		1990	11 March	Integrated with Service 4 and discontinued.

3rd Generation (Current)

History of Service 19

Service 20

1st Generation (1971 - 1989)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Fidelio St ↔ Commonwealth Ave	1971	11 April	Introduced between Fidelio St Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
	Chai Chee ↔ Commonwealth Ave	1973	1 July	Operations transferred to Singapore Bus Services.
				Amended to Chai Chee Ter.
		1974	8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1975	2 March	Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
	Chai Chee ↔ Ghim Moh	1977	7 March	Extended to Ghim Moh Ter.
			17 May	Amended to ply Commonwealth Ave Extension.
		1978	15 January	Amended to ply Jln Sultan, skipping Sumbawa Rd.
		1979	11 February	Amended to ply the extended Shenton Way towards Ghim Moh Ter, skipping Parsi Rd and Anson Rd.
			14 October	Amended to ply Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way traffic.
		1981	11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
	Bedok ↔ Ghim Moh	1985	8 September	Extended to Bedok Int with the closure of Chai Chee Ter.
		1988	3 January	Serves new staggered bus stop opposite Treasury Bldg along Shenton Way, skipping the bus stop opposite Marina Hse.
		1989	5 November	Integrated with Service 100 and discontinued.

2nd Generation (1994 - 2000)

Operator	Route	Year	Date	Service changes
	Sims Pl ↺ St. Wilfred Rd	1994	17 October	Introduced between Sims Pl Ter and St. Wilfred Rd (Loop).
		2000	27 November	Integrated with Service 125 and discontinued.

3rd Generation (Current)

History of Service 20

Service 21

1st Generation (1971 - 1981)

Operator	Route	Year	Date	Service changes
Amalgamated Bus Company	Fidelio St ↔ Delta	1971	11 April	Introduced between Fidelio St Ter and Delta Circus Ter under 1971 Bus Reorganisation.
	Fidelio St ↔ Commonwealth Ave		25 April	Extended to Commonwealth Ave Ter.
		1973	11 March	Amended to ply Zion Rd towards Commonwealth Ave Ter with the partial conversion of Kim Seng Rd to one-way traffic.
	Chai Chee ↔ Commonwealth Ave		1 July	Operations transferred to Singapore Bus Services.
				Amended to Chai Chee Ter.
		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 March	Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang 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	15 November	Discontinued.

2nd Generation (Current)

History of Service 21

Service 22

1st Generation (1971 - 1984)

Operator	Route	Year	Date	Service changes
Amalgamated Bus Company	Fidelio St ↔ Labrador	1971	11 April	Introduced between Fidelio St Ter and Alexandra Rd Ter.
	Fidelio St ↔ Tg Berlayer	1972	TBC	Extended to Tg Berlayer Ter.
	Chai Chee ↔ Tg Berlayer	1973	1 July	Operations transferred to Singapore Bus Services.
				Amended to Chai Chee Ter.
		1974	3 February	Amended to skip Fidelio St under 1974 Bus Rationalisation.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
			2 March	Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
		1979	14 October	Amended to ply Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way traffic.
		1984	22 April	Discontinued.

2nd Generation (Current)

History of Service 22

Service 23 (Current)

History of Service 23

Service 24 (Current)

History of Service 24

Service 25 (Current)

History of Service 25

Service 26 (Current)

History of Service 26

Service 27 (Current)

History of Service 27

Service 28

1st Generation (1983 - 1992)

Operator	Route	Year	Date	Service changes
	Tampines ↺ New Bridge Rd	1983	4 September	Introduced between Tampines Ter and New Bridge Rd (Loop).
	Tampines ↔ 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 Tampines Ave 5 Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Tampines Ave 5 Ter to facilitate the second stage of road expansion along New Bridge Rd.
			29 November	Amended to Tampines Int.
			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.
			23 October	Skips a pair of bus stops outside and opposite Tampines Stadium along Tampines Ave 5.
		1990	22 July	Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
		1992	29 November	Integrated with Service 2 and discontinued under TransitLink Network Integration Exercise Phase 10.

2nd Generation (Current)

History of Service 28

Service 29 (Current)

History of Service 29

Service 30/30A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Changi Rd ↔ Prince Edward	1971	11 April	Introduced between Changi Rd Ter and Prince Edward Ter under 1971 Bus Reorganisation.
	Changi Rd ↔ Intl Rd		2 May	Extended to Intl Rd Ter.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
	Changi Rd ↔ Jln Ahmad Ibrahim	1972	24 December	Amended to Jln Ahmad Ibrahim Ter.
	Chai Chee ↔ Jln Ahmad Ibrahim	1973	1 July	Operations transferred to Singapore Bus Services.
				Amended to Chai Chee Ter.
		1974	3 February	Amended to skip Stamford Rd, Waterloo St and Bras Basah Rd and re-numbered Service 30 under 1974 Bus Rationalisation.

Service 30 (Current)

History of Service 30

Service 31/31A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Changi Rd ↔ Prince Edward	1971	11 April	Introduced between Changi Rd Ter and Prince Edward Ter under 1971 Bus Reorganisation.
	Changi Rd ↺ Outram Pk		9 May	Extended to loop at Outram Pk.
	Chai Chee ↺ Outram Pk	1973	1 July	Operations transferred to Singapore Bus Services.
				Amended to Chai Chee Ter.
		1974	3 February	Amended to New Bridge Rd Ter and re-numbered Service 31 under 1974 Bus Rationalisation.

Service 31

1st Generation (1974 - 1976)

Operator	Route	Year	Date	Service changes
	Chai Chee ↔ New Bridge Rd	1974	3 February	Re-numbered from Service 31 between Chai Chee Ter and New Bridge Rd Ter under 1974 Bus Rationalisation.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
			2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
		1976	2 August	Discontinued.

2nd Generation (Current)

History of Service 31

Service 32 (Current)

History of Service 32

Service 33 (Current)

History of Service 33

Service 33X (1985 - 1988)

Operator	Route	Year	Date	Service changes
	Bedok ↔ Kent Ridge	1985	15 September	Introduced as alternate trips between Bedok Int and Kent Ridge Ter, plying its former route via Sims Ave/Geylang Rd.
		1986	1 June	Skips removed bus stop before Ayer Rajah Rd along Clementi Rd.
		1987	6 April	Skips removed bus stop before College Rd along Outram Rd.
			27 July	Converted to peak hour service on weekdays and Saturdays.
			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 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	11 January	Serves merged bus stop along Ayer Rajah Rd.
			20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
			29 May	Amended to ply Buona Vista Flyover with the opening of the Ayer Rajah Expressway (AYE), skipping Portsdown Rd.
			24 October	Discontinued.

Service 34

1st Generation (1995 - 2002)

Operator	Route	Year	Date	Service changes
Known as prior to 1 November 2001	Bedok ↺ Changi Airport	1995	24 April	Introduced between Bedok Int and Changi Airport (Loop), operating on weekdays and Saturdays only.
	Bedok ↔ Changi Airport	1996	TBC	Converted to bi-directional service between Bedok Int and Changi Airport PTB 1.
		2000	TBC	Serves new pair of bus stops outside and opposite SATS Flight Kitchen along Airport Blvd.
		2002	15 September	Discontinued.

2nd Generation (Current)

History of Service 34

Service 35 (Current)

History of Service 35

Service 35M (Current)

History of Service 35M

Service 36 (Current)

History of Service 36

Service 37 (Current)

History of Service 37

Service 38 (Current)

History of Service 38

Service 39 (Current)

History of Service 39

Service 40 (Current)

History of Service 40

Service 41

1st Generation (1971 - 1991)

Operator	Route	Year	Date	Service changes
Amalgamated Bus Company	Telok Kurau Rd ↔ Redhill	1971	11 April	Introduced between Telok Kurau Rd Ter and Redhill Cl Ter under 1971 Bus Reorganisation.
	Chai Chee ↔ Redhill	1973	1 July	Operations transferred to Singapore Bus Services.
				Extended to Chai Chee Ter.
		1974	3 February	Amended to ply Still Rd, skipping Telok Kurau Rd under 1974 Bus Rationalisation.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
			2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
		1976	18 April	Amended to ply Bedok Sth Rd, Bedok Sth Ave 1, Marine Parade Rd and Amber Rd, skipping Changi Rd, Still Rd and East Coast Rd.
			30 December	Amended to ply Paya Lebar Rd, Sims Ave and the extended Tg Katong Rd towards Chai Chee Ter.
	Bedok ↔ Redhill	1985	7 April	Amended to Bedok Int.
	Bedok ↔ Bukit Merah		15 September	Integrated with Service 44 and extended to Bt Merah Int.
		1987	6 April	Skips removed bus stop before College Rd along Outram Rd.
			27 September	Amended to ply the extended Eu Tong Sen St towards Bedok Int 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.
		1988	20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1990	22 July	Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
		1991	7 April	Integrated with Service 197 and discontinued under TransitLink Network Integration Exercise Phase 3.

2nd Generation (Current)

History of Service 41

Service 41A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Amalgamated Bus Company	Joo Chiat Pl ↔ Redhill	1971	11 April	Introduced between Joo Chiat Pl Ter and Redhill Cl Ter under 1971 Bus Reorganisation.
	Chai Chee ↔ Redhill	1973	1 July	Operations transferred to Singapore Bus Services.
				Extended to Chai Chee Ter.
		1974	3 February	Re-numbered Service 44 under 1974 Bus Rationalisation.

Service 42

1st Generation (1971 - 1978)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Telok Kurau Rd ↔ Intl Rd	1971	11 April	Introduced between Telok Kurau Rd Ter and Intl Rd Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
		1972	24 December	Extended to relocated Intl Rd Ter (near Fourth Lok Yang Rd).
	Chai Chee ↔ Intl Rd	1973	1 July	Operations transferred to Singapore Bus Services.
				Extended to Chai Chee Ter.
		1974	8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1976	15 February	Serves new staggered bus stop outside Overseas Union Finance along Robinson Rd.
			30 December	Amended to ply Paya Lebar Rd, Sims Ave and the extended Tg Katong Rd towards Chai Chee Ter.
		1978	1 June	Discontinued.

2nd Generation (Current)

History of Service 42

Service 43

1st Generation (1971 - 1975)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Telok Kurau Rd ↔ Prince Edward	1971	11 April	Introduced between Telok Kurau Rd Ter and Prince Edward Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to Associated Bus Services.
	Telok Kurau Rd ↔ Benoi Rd	1972	24 December	Extended to Benoi Rd Ter.
				Amended to ply Corporation Rd, Yung Ho Rd, Corporation Dr and Corporation Rd during off peak hours daily.
	Chai Chee ↔ Benoi Rd	1973	1 July	Operations transferred to Singapore Bus Services.
				Extended to Chai Chee Ter.
	Prince Edward ↺ Kallang Pk/Natl Stadium	1974	3 February	Shortened to start from Prince Edward Ter, shortened to loop at Kallang Pk and converted to peak hour service on weekdays and Saturdays only under 1974 Bus Rationalisation.
			8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1975	8 June	Discontinued.

2nd Generation (Current)

History of Service 43

Service 43M (Current)

History of Service 43M

Service 44

1st Generation (April - May 1971)

Operator	Route	Year	Date	Service changes
Amalgamated Bus Company	Telok Kurau Rd ↔ Delta Circus	1971	11 April	Introduced between Telok Kurau Rd Ter and Delta Circus Ter under 1971 Bus Reorganisation.
			2 May	Discontinued.

2nd Generation (1974 - 1985)

Operator	Route	Year	Date	Service changes
	Chai Chee ↔ Redhill	1974	3 February	Re-numbered from Service 41A as a service between Chai Chee Ter and Redhill Cl Ter.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
			2 March	Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
		1979	14 October	Amended to ply Still Rd and Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way traffic, skipping Telok Kurau Rd.
			14 November	Amended to ply Telok Kurau Rd, skipping Still Rd.
	Chai Chee ↔ Bukit Merah	1981	15 November	Integrated with Service 63 and extended to Bt Merah Int.
		1985	15 September	Integrated with Service 33 and discontinued with the closure of Chai Chee Ter.

Service 45

1st Generation (1971 - 1984)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Kallang Pk ↺ Haig Rd	1971	11 April	Introduced between Kallang Pk Ter and Haig Rd (Loop) under 1971 Bus Reorganisation.
	Kallang Pk ↺ Kreta Ayer Rd		9 May	Extended to loop at Kreta Ayer Rd.
		1973	1 July	Operations transferred to Singapore Bus Services.
	Chai Chee ↺ Tg Rhu Rd	1974	3 February	Amended to start from Chai Chee Ter and shortened to loop at Tg Rhu Rd under 1974 Bus Rationalisation.
		1979	14 October	Amended to ply Still Rd and Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way traffic.
		1984	27 May	Discontinued.

2nd Generation (Current)

History of Service 45

Service 46

1st Generation (1971 - 1975)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Tg Rhu Ter ↺ Kreta Ayer Rd	1971	11 April	Introduced between Tg Rhu Ter and Kreta Ayer Rd (Loop) under 1971 Bus Reorganisation.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1975	22 June	Discontinued.

2nd Generation (1978 - 1981)

Operator	Route	Year	Date	Service changes
	Geylang Fringe Car Pk ↺ Stadium Wk	1978	1 April	Introduced between Geylang Fringe Car Pk and Stadium Wk (Loop).
		1981	11 November	Discontinued.

3rd Generation (Current)

History of Service 46

Service 47 (Current)

History of Service 47

Service 48 (Current)

History of Service 48

Service 49 (Current)

History of Service 49

Service 50

1st Generation (1971 - 1991)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Kaki Bukit ↔ Prince Edward	1971	11 April	Introduced between Kaki Bt Ter and Prince Edward Ter under 1971 Bus Reorganisation.
	Kaki Bukit ↔ Lengkok Bahru		9 May	Extended to Lengkok Bahru Ter.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Amended to ply Sims Ave and Paya Lebar Rd under 1974 Bus Rationalisation, skipping Geylang Rd and Changi Rd.
			8 December	Amended to skip Market St.
		1975	2 February	Amended to ply new slip road from Tiong Bahru Rd to Outram Rd with the conversion of Seng Poh Rd to one-way traffic.
			2 March	Amended to ply Geylang Rd towards Lengkok Bahru Ter with the conversion of Sims Ave to one-way traffic.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
		1978	15 January	Amended to ply Jln Sultan, skipping Sumbawa Rd.
		1979	11 February	Amended to ply the extended Shenton Way towards Lengkok Bahru Ter, skipping Parsi Rd and Anson Rd.
	Kaki Bukit ↔ Bukit Merah		23 December	Amended to Bt Merah Ctrl Ter.
		1980	20 January	Amended to ply Spottiswoode Pk Rd with the partial conversion of Cantonment Rd to one-way traffic.
			28 September	Amended to Bt Merah Int.
		1981	11 October	Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
	Jln Eunos ↔ Bukit Merah	1984	17 June	Amended to Jln Eunos Ter.
	Eunos ↔ Bukit Merah	1987	22 March	Amended to Eunos Ter.
			6 April	Skips removed bus stop before College Rd along Outram Rd.
		1989	10 December	Amended to Eunos Int.
		1991	6 January	Discontinued under TransitLink Network Integration Exercise Phase 1.

2nd Generation (Current)

History of Service 50

Service 50A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Associated Bus Services	Kaki Bt ↺ Stamford Rd	1971	11 April	Introduced between Kaki Bt Ter and Stamford Rd (Loop) under 1971 Bus Reorganisation.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Extended to Alexandra Rd (Alexandra Hosp) Ter and re-numbered Service 53 under 1974 Bus Rationalisation.