View source for History of Services 1 - 50

==Service 1 (1971 - 1989)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABS}}
|rowspan=13|Changi Point ↔ Delta Circus
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Changi Pt Ter and Delta Circus Ter under 1971 Bus Reorganisation.
|-
|rowspan=2|'''1973'''
|'''11 March'''
|style='text-align:left'|Amended to ply Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd to one-way traffic.
|-
|rowspan=18|{{SBS}}
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|rowspan=2|'''1974'''
|'''1 December'''
|style='text-align:left'|Amended to ply New Upp Changi Rd, Bedok Plain, Bedok Hts, Upp East Coast Rd and Bedok Rd.
|-
|'''8 December'''
|style='text-align:left'|Amended to ply the extended Robinson Rd, skipping Market St.
|-
|rowspan=5|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Sims Ave towards Changi Pt Ter with the conversion of Geylang Rd to one-way traffic.
|-
|'''25 May'''
|style='text-align:left'|Amended to ply Bedok Wk and New Upp Changi Rd, skipping Bedok Hts and Upp East Coast Rd.
|-
|{{TBC}}
|style='text-align:left'|Amended to new Changi Pt Ter.
|-
|'''14 November'''
|style='text-align:left'|Amended to ply New Upp Changi Rd, skipping Bedok Plain and Bedok Wk.
|-
|'''1976'''
|'''15 February'''
|style='text-align:left'|Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
|-
|rowspan=3|'''1979'''
|'''11 February'''
|style='text-align:left'|Amended to ply the extended Shenton Way towards Delta Circus Ter, skipping Parsi Rd and Anson Rd.
|-
|'''14 October'''
|style='text-align:left'|Amended to ply Sims Ave East towards Changi Pt Ter with the conversion of Changi Rd to one-way traffic.
|-
|rowspan=7|Changi Point ↔ Delta Fringe Car Park
|'''11 November'''
|style='text-align:left'|Amended to Delta Fringe Car Pk.
|-
|'''1980'''
|'''20 January'''
|style='text-align:left'|Amended to ply Spottiswoode Pk Rd with the partial conversion of Cantonment Rd to one-way traffic.
|-
|rowspan=3|'''1981'''
|'''15 June'''
|style='text-align:left'|Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
|-
|'''11 October'''
|style='text-align:left'|Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
|-
|'''8 November'''
|style='text-align:left'|Revised to operate on weekdays and Saturdays only.
|-
|'''1987'''
|'''6 April'''
|style='text-align:left'|Skips removed bus stop before College Rd along Outram Rd.
|-
|'''1989'''
|'''5 November'''
|style='text-align:left'|Discontinued.
|}

==Service 1A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABS}}
|rowspan=4|Changi Point ↔ Delta Circus
|'''1971'''
|'''1 August'''
|style='text-align:left'|Introduced between Changi Pt Ter and Delta Circus Ter.
|-
|rowspan=2|'''1973'''
|'''11 March'''
|style='text-align:left'|Amended to ply Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd to one-way traffic.
|-
|rowspan=2|{{SBS}}
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Re-numbered Service 3 under 1974 Bus Rationalisation.
|}

==Service 2 (Current)==
{{:Bus Service 2}}

==Service 2A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABS}}
|rowspan=3|Changi Point ↔ Commonwealth Avenue
|'''1971'''
|'''1 August'''
|style='text-align:left'|Introduced between Changi Pt Ter and Commonwealth Ave Ter.
|-
|rowspan=2|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Discontinued under 1974 Bus Rationalisation.
|}

==Service 3==
===1st Generation (1974 - 1991)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=21|{{SBS}}
|rowspan=7|Changi Point ↔ Delta Circus
|rowspan=2|'''1974'''
|'''3 February'''
|style='text-align:left'|Re-numbered from Service 1A as a service between Changi Pt Ter and Delta Circus Ter.
|-
|'''1 December'''
|style='text-align:left'|Amended to ply New Upp Changi Rd, Bedok Plain, Bedok Hts, Upp East Coast Rd and Bedok Rd.
|-
|rowspan=4|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Sims Ave towards Changi Pt Ter with the conversion of Geylang Rd to one-way traffic.
|-
|'''25 May'''
|style='text-align:left'|Amended to ply Bedok Wk and New Upp Changi Rd, skipping Bedok Hts and Upp East Coast Rd.
|-
|{{TBC}}
|style='text-align:left'|Amended to new Changi Pt Ter.
|-
|rowspan=2|'''1976'''
|'''15 July'''
|style='text-align:left'|Amended to ply Upp Changi Rd, skipping Telok Paku Rd and Nicoll Dr.
|-
|Bedok South Rd ↺ New Bridge Rd
|'''2 August'''
|style='text-align:left'|Shortened to start from Bedok Sth Rd Ter and loop at New Bridge Rd.
|-
|rowspan=5|Bedok ↺ New Bridge Rd
|rowspan=2|'''1979'''
|'''8 April'''
|style='text-align:left'|Amended to Bedok Int and converted to a semi-express service.
|-
|'''14 October'''
|style='text-align:left'|Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way traffic.
|-
|'''1983'''
|'''27 November'''
|style='text-align:left'|Integrated with Service 6 and amended to ply Kallang Rd/Crawford St and Victoria St/Nth Bridge Rd.
|-
|rowspan=2|'''1986'''
|'''12 January'''
|style='text-align:left'|Converted to trunk service.
|-
|'''6 July'''
|style='text-align:left'|Serves the bus stop outside Blk 414 along Sims Ave, skipping the bus stop outside Blk 416.
|-
|rowspan=8|Bedok ↔ Jurong East
|rowspan=3|'''1987'''
|'''1 February'''
|style='text-align:left'|Extended to Jurong East Int.
|-
|'''27 September'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
|-
|rowspan=2|'''1989'''
|'''19 February'''
|style='text-align:left'|Serves new bus stop outside Blk 135 along Jurong East St 13.
|-
|'''19 November'''
|style='text-align:left'|Serves new bus stop outside Kallang Stn along Sims Ave.
|-
|'''1990'''
|'''22 July'''
|style='text-align:left'|Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
|-
|'''1991'''
|'''6 January'''
|style='text-align:left'|Discontinued under TransitLink Network Integration Exercise Phase 1.
|}

===2nd Generation (Current)===
{{:Bus Service 3}}

==Service 4==
===1st Generation (1971 - 1974)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABS}}
|rowspan=3|Changi Point ↺ Lloyd Leas Estate
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Changi Pt Ter and Lloyd Leas Est (Loop) under 1971 Bus Reorganisation.
|-
|rowspan=2|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Discontinued under 1974 Bus Rationalisation.
|}

===2nd Generation (1979 - 1993)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=8|{{SBS}}
|rowspan=2|Bedok ↺ Lor 1 Geylang
|rowspan=2|'''1979'''
|'''11 March'''
|style='text-align:left'|Introduced between Bedok Int and Lor 1 Geylang (Loop).
|-
|'''14 October'''
|style='text-align:left'|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'''
|style='text-align:left'|Extended to loop at Moulmein Rd.
|-
|rowspan=2|Bedok ↔ St. Michael's
|'''1988'''
|'''31 July'''
|style='text-align:left'|Extended to St. Michael's Ter.
|-
|'''1989'''
|'''19 November'''
|style='text-align:left'|Serves new bus stop outside Kallang Stn along Sims Ave.
|-
|Pasir Ris ↔ St. Michael's
|'''1990'''
|'''11 March'''
|style='text-align:left'|Integrated with Service 19 and extended to Pasir Ris Int.
|-
|rowspan=2|Tampines ↔ St. Michael's
|'''1992'''
|'''29 November'''
|style='text-align:left'|Shortened to Tampines Int under TransitLink Network Integration Exercise Phase 10.
|-
|'''1993'''
|'''23 May'''
|style='text-align:left'|Integrated with Services 21 and 67 and discontinued under TransitLink Network Integration Exercise Phase 13.
|}

===3rd Generation (Current)===
{{:Bus Service 4}}

==Service 5==
===1st Generation (1971 - 1999)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=4|{{ABC}}
|rowspan=3|Upper Changi Road 8¼ ms ↔ Commonwealth Ave
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Upp Changi Rd 8¼ m.s. Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
|-
|'''28 September'''
|style='text-align:left'|Amended to ply the extended Ganges Ave towards Upp Changi Rd 8¼ m.s. Ter.
|-
|'''1972'''
|'''11 June'''
|style='text-align:left'|Amended to ply the extended Upp Cross St with the partial conversion of Havelock Rd to one-way traffic, skipping New Bridge Rd.
|-
|rowspan=2|Upp Changi Rd 8¼ ms ↔ Bukit Timah
|'''1973'''
|{{TBC}}
|style='text-align:left'|Extended to Bt Timah Ter.
|-
|rowspan=17|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|rowspan=2|Chai Chee ↔ Bukit Timah
|'''1974'''
|'''3 February'''
|style='text-align:left'|Shortened to Chai Chee Ter under 1974 Bus Rationalisation.
|-
|'''1975'''
|'''2 March'''
|style='text-align:left'|Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
|-
|rowspan=4|Lor 1 Geylang ↔ Bukit Timah
|'''1977'''
|'''17 October'''
|style='text-align:left'|Shortened to Geylang Fringe Car Pk and amended to ply Lavender St, Kallang Bahru, Boon Keng Rd and Lor 1 Geylang.
|-
|rowspan=2|'''1979'''
|'''11 November'''
|style='text-align:left'|Amended to ply Ganges Ave towards Bt Timah Ter with the realignment of Delta Circus.
|-
|'''30 December'''
|style='text-align:left'|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'''
|style='text-align:left'|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.
|-
|rowspan=15|Lor 1 Geylang ↔ Bukit Panjang
|'''1986'''
|'''1 June'''
|style='text-align:left'|Extended to Zhenghua Ter.
|-
|rowspan=3|'''1987'''
|'''27 September'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
|-
|rowspan=2|'''1989'''
|'''25 June'''
|style='text-align:left'|Skips the bus stop after Tan Boon Chong Ave along Holland Rd.
|-
|'''19 November'''
|style='text-align:left'|Serves new bus stop outside Kallang Stn along Sims Ave.
|-
|'''1990'''
|'''22 July'''
|style='text-align:left'|Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
|-
|'''1992'''
|'''29 March'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Jln Sultan, Victoria St, Hill St and New Bridge Rd, skipping Sth Bridge Rd and Upp Cross St.
|-
|'''1994'''
|'''3 July'''
|style='text-align:left'|Amended to ply Kallang Rd and Victoria St, skipping Crawford St, Nth Bridge Rd and Jln Sultan.
|-
|rowspan=5|{{TIBS}}
|'''1995'''
|'''17 September'''
|style='text-align:left'|Operations transferred to Trans Island Bus Services.
|-
|rowspan=3|'''1997'''
|{{TBC}}
|style='text-align:left'|Serves additional bus stop after Jln Bt Merah along Kg Bahru Rd.
|-
|'''7 December'''
|style='text-align:left'|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 {{NE4| }} station on the {{NEL}}.
|-
|'''8 December'''
|style='text-align:left'|Skips the bus stop outside Kallang Stn along Sims Ave.
|-
|'''1999'''
|'''26 December'''
|style='text-align:left'|Discontinued under {{BPLRT}} Rationalisation.
|}

===2nd Generation (Current)===
{{:Bus Service 5}}

==Service 6==
===1st Generation (1977 - 1983)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=4|{{SBS}}
|Chai Chee ↺ North Bridge Rd
|'''1977'''
|'''11 July'''
|style='text-align:left'|Introduced between Chai Chee Ter and Nth Bridge Rd (Loop) as a semi-express service.
|-
|rowspan=3|Bedok ↺ North Bridge Rd
|rowspan=2|'''1979'''
|'''25 February'''
|style='text-align:left'|Amended to Bedok Int.
|-
|'''14 October'''
|style='text-align:left'|Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way traffic.
|-
|'''1983'''
|'''27 November'''
|style='text-align:left'|Integrated with Service 3 and discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 6}}

==Service 7 (Current)==
{{:Bus Service 7}}

==Service 8==
===1st Generation (1979 - 1989)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=6|{{SBS}}
|rowspan=3|Bedok ↺ Shenton Way
|rowspan=2|'''1979'''
|'''26 February'''
|style='text-align:left'|Introduced between Bedok Int and Shenton Way (Loop) as a semi-express service, operating on weekdays and Saturdays only.
|-
|'''14 October'''
|style='text-align:left'|Amended to ply Sims Ave East towards Bedok Int with the conversion of Changi Rd to one-way traffic.
|-
|'''1981'''
|'''11 October'''
|style='text-align:left'|Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
|-
|Bedok ↺ Robinson Rd
|'''1982'''
|'''5 April'''
|style='text-align:left'|Amended to ply Bedok Sth Rd, Bedok Sth Ave 1 and ECP, skipping Connaught Dr, Collyer Quay, Raffles Quay and Shenton Way.
|-
|rowspan=2|Bedok ↺ Marina Ctr
|'''1986'''
|'''30 November'''
|style='text-align:left'|Extended to loop at Marina Ctr.
|-
|'''1989'''
|'''6 November'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 8}}

==Service 9 (Current)==
{{:Bus Service 9}}

==Service 10 (Current)==
{{:Bus Service 10}}

==Service 11==
===1st Generation (1971 - 1988)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABS}}
|rowspan=2|Bedok Rd ↔ Tg Pagar Rd
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Bedok Rd Ter and Tg Pagar Ter under 1971 Bus Reorganisation.
|-
|rowspan=12|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|rowspan=2|Upp Changi Rd 8¼ ms ↔ Tg Pagar Rd
|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to Upp Changi Rd 8¼ ms (13.3km) Ter under 1974 Bus Rationalisation.
|-
|'''1975'''
|'''2 March'''
|style='text-align:left'|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.
|-
|rowspan=2|Upp Changi Rd 8¼ ms ↔ New Bridge Rd
|rowspan=2|'''1979'''
|'''28 May'''
|style='text-align:left'|Amended to New Bridge Rd Ter.
|-
|{{TBC}}
|style='text-align:left'|Relocated to Upp Changi Rd 15.5km Ter.
|-
|Somapah Depot ↔ New Bridge Rd
|'''1980'''
|'''16 June'''
|style='text-align:left'|Amended to Somapah Depot.
|-
|rowspan=6|Somapah ↔ New Bridge Rd
|'''1981'''
|'''28 June'''
|style='text-align:left'|Amended to Somapah Int.
|-
|'''1986'''
|'''7 December'''
|style='text-align:left'|Serves new bus stop before Bedok Sth Ave 3 along Upp East Coast Rd.
|-
|rowspan=3|'''1987'''
|'''6 June'''
|style='text-align:left'|Amended to relocated New Bridge Rd Ter.
|-
|'''27 September'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|Integrated with Service 12 and discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 11}}

==Service 12 (Current)==
{{:Bus Service 12}}

==Service 13 (Current)==
{{:Bus Service 13}}

==Service 13A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABS}}
|rowspan=3|Bedok Road ↔ Commonwealth Avenue
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Bedok Rd Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
|-
|rowspan=2|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Re-numbered Service 14 under 1974 Bus Rationalisation.
|}

==Service 14 (Current)==
{{:Bus Service 14}}

==Service 15==
===1st Generation (1975 - 1984)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=10|{{SBS}}
|rowspan=3|Marine Terrace ↔ Prince Edward
|'''1975'''
|'''22 June'''
|style='text-align:left'|Introduced between Marine Terr Ter and Prince Edward Ter.
|-
|rowspan=3|'''1976'''
|'''15 February'''
|style='text-align:left'|Serves new staggered bus stop outside Overseas Union Finance along Robinson Rd.
|-
|'''14 March'''
|style='text-align:left'|Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
|-
|rowspan=4|Marine Terrace ↺ Shenton Way
|'''4 July'''
|style='text-align:left'|Extended to loop at Shenton Way from Marine Terr Ter.
|-
|'''1977'''
|'''27 March'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Marine Parade Rd and Amber Rd, skipping Joo Chiat Rd and East Coast Rd.
|-
|'''1979'''
|'''11 February'''
|style='text-align:left'|Amended to ply the extended Shenton Way, Keppel Rd and Anson Rd, skipping Parsi Rd.
|-
|rowspan=3|Marine Parade ↺ Shenton Way
|rowspan=2|'''1981'''
|'''5 July'''
|style='text-align:left'|Amended to Marine Parade Ter.
|-
|'''11 October'''
|style='text-align:left'|Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
|-
|'''1984'''
|'''16 September'''
|style='text-align:left'|Integrated with Service 196 and discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 15}}

==Service 16 (Current)==
{{:Bus Service 16}}

==Service 16E (1994 - 1997)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBS}}
|rowspan=2|{{Bus/D|AM|style=border:1px solid|note=Bukit Merah → Changi Airport}}{{Bus/D|PM|style=border:1px solid|note=Changi Airport → Bukit Merah}}
|'''1994'''
|'''31 January'''
|style='text-align:left'|Introduced between Bt Merah Int and Changi Airport as a peak hour uni-directional semi-express service on weekdays.
|-
|'''1997'''
|'''1 December'''
|style='text-align:left'|Re-numbered Service 36.
|}

==Service 17==
===1st Generation (1981 - 1984)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=3|{{SBS}}
|rowspan=3|Changi Point ↔ Prince Edward
|rowspan=2|'''1981'''
|'''2 February'''
|style='text-align:left'|Introduced between Changi Pt Ter and Prince Edward Ter, operating on weekdays and Saturdays only.
|-
|'''15 June'''
|style='text-align:left'|Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
|-
|'''1984'''
|'''8 April'''
|style='text-align:left'|Discontinued.
|}

==2nd Generation (Current)==
{{:Bus Service 17}}

==Service 18 (Current)==
{{:Bus Service 18}}

==Service 19==
===1st Generation (1979 - 1981)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=3|{{SBS}}
|Siglap Rd ↔ Prince Edward
|'''1979'''
|{{TBC}}
|style='text-align:left'|Introduced between Siglap Rd and Prince Edward Ter.
|-
|rowspan=2|{{Bus/D|AM|style=border:1px solid|note=Siglap Rd → Prince Edward}}{{Bus/D|PM|style=border:1px solid|note=Prince Edward → Siglap Rd}}
|'''1980'''
|'''12 May'''
|style='text-align:left'|Converted to peak-hour one-directional service on weekdays and Saturdays only.
|-
|'''1981'''
|'''11 August'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (1988 - 1990)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=3|{{SBS}}
|Bedok ↺ Pasir Ris Dr 6
|'''1988'''
|'''19 June'''
|style='text-align:left'|Introduced between Bedok Int and Pasir Ris Dr 6 (Loop).
|-
|rowspan=2|Bedok ↔ Pasir Ris
|'''1989'''
|'''10 December'''
|style='text-align:left'|Amended to Pasir Ris Int.
|-
|'''1990'''
|'''11 March'''
|style='text-align:left'|Integrated with Service 4 and discontinued.
|}

===3rd Generation (Current)===
{{:Bus Service 19}}

==Service 20==
===1st Generation (1971 - 1989)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{SGTC}}
|rowspan=2|Fidelio St ↔ Commonwealth Ave
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Fidelio St Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
|-
|{{ABS}}
|'''6 December'''
|style='text-align:left'|Operations transferred to Associated Bus Services.
|-
|rowspan=14|{{SBS}}
|rowspan=5|Chai Chee ↔ Commonwealth Ave
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Amended to Chai Chee Ter.
|-
|'''1974'''
|'''8 December'''
|style='text-align:left'|Amended to ply the extended Robinson Rd, skipping Market St.
|-
|'''1975'''
|'''2 March'''
|style='text-align:left'|Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
|-
|'''1976'''
|'''15 February'''
|style='text-align:left'|Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
|-
|rowspan=6|Chai Chee ↔ Ghim Moh
|rowspan=2|'''1977'''
|'''7 March'''
|style='text-align:left'|Extended to Ghim Moh Ter.
|-
|'''17 May'''
|style='text-align:left'|Amended to ply Commonwealth Ave Extension.
|-
|'''1978'''
|'''15 January'''
|style='text-align:left'|Amended to ply Jln Sultan, skipping Sumbawa Rd.
|-
|rowspan=2|'''1979'''
|'''11 February'''
|style='text-align:left'|Amended to ply the extended Shenton Way towards Ghim Moh Ter, skipping Parsi Rd and Anson Rd.
|-
|'''14 October'''
|style='text-align:left'|Amended to ply Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way traffic.
|-
|'''1981'''
|'''11 October'''
|style='text-align:left'|Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
|-
|rowspan=3|Bedok ↔ Ghim Moh
|'''1985'''
|'''8 September'''
|style='text-align:left'|Extended to Bedok Int with the closure of Chai Chee Ter.
|-
|'''1988'''
|'''3 January'''
|style='text-align:left'|Serves new staggered bus stop opposite Treasury Bldg along Shenton Way, skipping the bus stop opposite Marina Hse.
|-
|'''1989'''
|'''5 November'''
|style='text-align:left'|Integrated with Service 100 and discontinued.
|}

===2nd Generation (1994 - 2000)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBS}}
|rowspan=2|Sims Pl ↺ St. Wilfred Rd
|'''1994'''
|'''17 October'''
|style='text-align:left'|Introduced between Sims Pl Ter and St. Wilfred Rd (Loop).
|-
|'''2000'''
|'''27 November'''
|style='text-align:left'|Integrated with Service 125 and discontinued.
|}

===3rd Generation (Current)===
{{:Bus Service 20}}

==Service 21==
===1st Generation (1971 - 1981)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=3|{{ABC}}
|Fidelio St ↔ Delta
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Fidelio St Ter and Delta Circus Ter under 1971 Bus Reorganisation.
|-
|rowspan=2|Fidelio St ↔ Commonwealth Ave
|'''25 April'''
|style='text-align:left'|Extended to Commonwealth Ave Ter.
|-
|rowspan=3|'''1973'''
|'''11 March'''
|style='text-align:left'|Amended to ply Zion Rd towards Commonwealth Ave Ter with the partial conversion of Kim Seng Rd to one-way traffic.
|-
|rowspan=7|{{SBS}}
|rowspan=7|Chai Chee ↔ Commonwealth Ave
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Amended to Chai Chee Ter.
|-
|rowspan=2|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
|-
|rowspan=2|'''1977'''
|'''17 May'''
|style='text-align:left'|Amended to ply Commonwealth Ave Extension and Nth Buona Vista Rd towards Commonwealth Ave Ter.
|-
|'''29 August'''
|style='text-align:left'|Amended to ply Holland Ave, Holland Dr and Nth Buona Vista Rd towards Commonwealth Ave Ter.
|-
|'''1981'''
|'''15 November'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 21}}

==Service 22==
===1st Generation (1971 - 1984)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABC}}
|Fidelio St ↔ Labrador
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Fidelio St Ter and Alexandra Rd Ter.
|-
|Fidelio St ↔ Tg Berlayer
|'''1972'''
|{{TBC}}
|style='text-align:left'|Extended to Tg Berlayer Ter.
|-
|rowspan=7|{{SBS}}
|rowspan=7|Chai Chee ↔ Tg Berlayer
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Amended to Chai Chee Ter.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to skip Fidelio St under 1974 Bus Rationalisation.
|-
|rowspan=2|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Sims Ave towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
|-
|'''1979'''
|'''14 October'''
|style='text-align:left'|Amended to ply Sims Ave East towards Chai Chee Ter with the conversion of Changi Rd to one-way traffic.
|-
|'''1984'''
|'''22 April'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 22}}

==Service 23 (Current)==
{{:Bus Service 23}}

==Service 24 (Current)==
{{:Bus Service 24}}

==Service 25 (Current)==
{{:Bus Service 25}}

==Service 26 (Current)==
{{:Bus Service 26}}

==Service 27 (Current)==
{{:Bus Service 27}}

==Service 28==
===1st Generation (1983 - 1992)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=11|{{SBS}}
|Tampines ↺ New Bridge Rd
|'''1983'''
|'''4 September'''
|style='text-align:left'|Introduced between Tampines Ter and New Bridge Rd (Loop).
|-
|rowspan=10|Tampines ↔ New Bridge Rd
|rowspan=6|'''1987'''
|'''3 May'''
|style='text-align:left'|Amended to terminate at New Bridge Rd Ter.
|-
|'''6 June'''
|style='text-align:left'|Amended to the relocated New Bridge Rd Ter.
|-
|'''27 September'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to Tampines Int.
|-
|'''13 December'''
|style='text-align:left'|Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
|-
|rowspan=2|'''1988'''
|'''20 March'''
|style='text-align:left'|Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
|-
|'''23 October'''
|style='text-align:left'|Skips a pair of bus stops outside and opposite Tampines Stadium along Tampines Ave 5.
|-
|'''1990'''
|'''22 July'''
|style='text-align:left'|Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
|-
|'''1992'''
|'''29 November'''
|style='text-align:left'|Integrated with Service 2 and discontinued under TransitLink Network Integration Exercise Phase 10.
|}

===2nd Generation (Current)===
{{:Bus Service 28}}

==Service 29 (Current)==
{{:Bus Service 29}}

==Service 30/30A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SGTC}}
|Changi Rd ↔ Prince Edward
|rowspan=3|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Changi Rd Ter and Prince Edward Ter under 1971 Bus Reorganisation.
|-
|rowspan=2|Changi Rd ↔ Intl Rd
|'''2 May'''
|style='text-align:left'|Extended to Intl Rd Ter.
|-
|rowspan=2|{{ABS}}
|'''6 December'''
|style='text-align:left'|Operations transferred to Associated Bus Services.
|-
|Changi Rd ↔ Jln Ahmad Ibrahim
|'''1972'''
|'''24 December'''
|style='text-align:left'|Amended to Jln Ahmad Ibrahim Ter.
|-
|rowspan=3|{{SBS}}
|rowspan=3|Chai Chee ↔ Jln Ahmad Ibrahim
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Amended to Chai Chee Ter.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to skip Stamford Rd, Waterloo St and Bras Basah Rd and re-numbered Service 30 under 1974 Bus Rationalisation.
|}

==Service 30 (Current)==
{{:Bus Service 30}}

==Service 31/31A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABS}}
|Changi Rd ↔ Prince Edward
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Changi Rd Ter and Prince Edward Ter under 1971 Bus Reorganisation.
|-
|Changi Rd ↺ Outram Pk
|'''9 May'''
|style='text-align:left'|Extended to loop at Outram Pk.
|-
|rowspan=3|{{SBS}}
|rowspan=3|Chai Chee ↺ Outram Pk
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Amended to Chai Chee Ter.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to New Bridge Rd Ter and re-numbered Service 31 under 1974 Bus Rationalisation.
|}

==Service 31==
===1st Generation (1974 - 1976)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=4|{{SBS}}
|rowspan=4|Chai Chee ↔ New Bridge Rd
|'''1974'''
|'''3 February'''
|style='text-align:left'|Re-numbered from Service 31 between Chai Chee Ter and New Bridge Rd Ter under 1974 Bus Rationalisation.
|-
|rowspan=2|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 31}}

==Service 32 (Current)==
{{:Bus Service 32}}

==Service 33 (Current)==
{{:Bus Service 33}}

==Service 33X (1985 - 1988)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=11|{{SBS}}
|rowspan=11|Bedok ↔ Kent Ridge
|'''1985'''
|'''15 September'''
|style='text-align:left'|Introduced as alternate trips between Bedok Int and Kent Ridge Ter, plying its former route via Sims Ave/Geylang Rd.
|-
|'''1986'''
|'''1 June'''
|style='text-align:left'|Skips removed bus stop before Ayer Rajah Rd along Clementi Rd.
|-
|rowspan=5|'''1987'''
|'''6 April'''
|style='text-align:left'|Skips removed bus stop before College Rd along Outram Rd.
|-
|'''27 July'''
|style='text-align:left'|Converted to peak hour service on weekdays and Saturdays.
|-
|'''27 September'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Eu Tong Sen St to facilitate the second stage of road expansion along New Bridge Rd.
|-
|'''13 December'''
|style='text-align:left'|Serves new staggered bus stop opposite Peninsula Plaza along Nth Bridge Rd, skipping the bus stop outside St Andrew's Cath.
|-
|rowspan=4|'''1988'''
|'''11 January'''
|style='text-align:left'|Serves merged bus stop along Ayer Rajah Rd.
|-
|'''20 March'''
|style='text-align:left'|Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
|-
|'''29 May'''
|style='text-align:left'|Amended to ply Buona Vista Flyover with the opening of the Ayer Rajah Expressway (AYE), skipping Portsdown Rd.
|-
|'''24 October'''
|style='text-align:left'|Discontinued.
|}

==Service 34==
===1st Generation (1995 - 2002)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=4|{{SBST}}<br>''Known as {{SBS}} prior to 1 November 2001''
|Bedok ↺ Changi Airport
|'''1995'''
|'''24 April'''
|style='text-align:left'|Introduced between Bedok Int and Changi Airport (Loop), operating on weekdays and Saturdays only.
|-
|rowspan=3|Bedok ↔ Changi Airport
|'''1996'''
|{{TBC}}
|style='text-align:left'|Converted to bi-directional service between Bedok Int and Changi Airport PTB 1.
|-
|'''2000'''
|{{TBC}}
|style='text-align:left'|Serves new pair of bus stops outside and opposite SATS Flight Kitchen along Airport Blvd.
|-
|'''2002'''
|'''15 September'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 34}}

==Service 35 (Current)==
{{:Bus Service 35}}

==Service 35M (Current)==
{{:Bus Service 35M}}

==Service 36 (Current)==
{{:Bus Service 36}}

==Service 37 (Current)==
{{:Bus Service 37}}

==Service 38 (Current)==
{{:Bus Service 38}}

==Service 39 (Current)==
{{:Bus Service 39}}

==Service 40 (Current)==
{{:Bus Service 40}}

==Service 41==
===1st Generation (1971 - 1991)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABC}}
|Telok Kurau Rd ↔ Redhill
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Telok Kurau Rd Ter and Redhill Cl Ter under 1971 Bus Reorganisation.
|-
|rowspan=15|{{SBS}}
|rowspan=7|Chai Chee ↔ Redhill
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Extended to Chai Chee Ter.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to ply Still Rd, skipping Telok Kurau Rd under 1974 Bus Rationalisation.
|-
|rowspan=2|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
|-
|rowspan=2|'''1976'''
|'''18 April'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Paya Lebar Rd, Sims Ave and the extended Tg Katong Rd towards Chai Chee Ter.
|-
|Bedok ↔ Redhill
|rowspan=2|'''1985'''
|'''7 April'''
|style='text-align:left'|Amended to Bedok Int.
|-
|rowspan=7|Bedok ↔ Bukit Merah
|'''15 September'''
|style='text-align:left'|Integrated with Service 44 and extended to Bt Merah Int.
|-
|rowspan=3|'''1987'''
|'''6 April'''
|style='text-align:left'|Skips removed bus stop before College Rd along Outram Rd.
|-
|'''27 September'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Eu Tong Sen St to facilitate the second stage of road expansion along New Bridge Rd.
|-
|'''1988'''
|'''20 March'''
|style='text-align:left'|Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
|-
|'''1990'''
|'''22 July'''
|style='text-align:left'|Serves additional bus stop outside Ellenborough Mkt along Eu Tong Sen St.
|-
|'''1991'''
|'''7 April'''
|style='text-align:left'|Integrated with Service 197 and discontinued under TransitLink Network Integration Exercise Phase 3.
|}

===2nd Generation (Current)===
{{:Bus Service 41}}

==Service 41A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABC}}
|Joo Chiat Pl ↔ Redhill
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Joo Chiat Pl Ter and Redhill Cl Ter under 1971 Bus Reorganisation.
|-
|rowspan=3|{{SBS}}
|rowspan=3|Chai Chee ↔ Redhill
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Extended to Chai Chee Ter.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Re-numbered Service 44 under 1974 Bus Rationalisation.
|}

==Service 42==
===1st Generation (1971 - 1978)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{SGTC}}
|rowspan=3|Telok Kurau Rd ↔ Intl Rd
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Telok Kurau Rd Ter and Intl Rd Ter under 1971 Bus Reorganisation.
|-
|rowspan=2|{{ABS}}
|'''6 December'''
|style='text-align:left'|Operations transferred to Associated Bus Services.
|-
|'''1972'''
|'''24 December'''
|style='text-align:left'|Extended to relocated Intl Rd Ter (near Fourth Lok Yang Rd).
|-
|rowspan=6|{{SBS}}
|rowspan=6|Chai Chee ↔ Intl Rd
|rowspan=2|'''1973'''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Extended to Chai Chee Ter.
|-
|'''1974'''
|'''8 December'''
|style='text-align:left'|Amended to ply the extended Robinson Rd, skipping Market St.
|-
|rowspan=2|'''1976'''
|'''15 February'''
|style='text-align:left'|Serves new staggered bus stop outside Overseas Union Finance along Robinson Rd.
|-
|'''30 December'''
|style='text-align:left'|Amended to ply Paya Lebar Rd, Sims Ave and the extended Tg Katong Rd towards Chai Chee Ter.
|-
|'''1978'''
|'''1 June'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 42}}

==Service 43==
===1st Generation (1971 - 1975)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{SGTC}}
|rowspan=2|Telok Kurau Rd ↔ Prince Edward
|rowspan=2|''1971''
|'''11 April'''
|style='text-align:left'|Introduced between Telok Kurau Rd Ter and Prince Edward Ter under 1971 Bus Reorganisation.
|-
|rowspan=3|{{ABS}}
|'''6 December'''
|style='text-align:left'|Operations transferred to Associated Bus Services.
|-
|rowspan=2|Telok Kurau Rd ↔ Benoi Rd
|rowspan=2|''1972''
|rowspan=2|'''24 December'''
|style='text-align:left'|Extended to Benoi Rd Ter.
|-
|style='text-align:left'|Amended to ply Corporation Rd, Yung Ho Rd, Corporation Dr and Corporation Rd during off peak hours daily.
|-
|rowspan=5|{{SBS}}
|rowspan=2|Chai Chee ↔ Benoi Rd
|rowspan=2|''1973''
|rowspan=2|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|style='text-align:left'|Extended to Chai Chee Ter.
|-
|rowspan=3|Prince Edward ↺ Kallang Pk/Natl Stadium
|rowspan=2|''1974''
|'''3 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply the extended Robinson Rd, skipping Market St.
|-
|''1975''
|'''8 June'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 43}}

==Service 43M (Current)==
{{:Bus Service 43M}}

==Service 44==
===1st Generation (April - May 1971)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABC}}
|rowspan=2|Telok Kurau Rd ↔ Delta Circus
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Telok Kurau Rd Ter and Delta Circus Ter under 1971 Bus Reorganisation.
|-
|'''2 May'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (1974 - 1985)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=7|{{SBS}}
|rowspan=5|Chai Chee ↔ Redhill
|'''1974'''
|'''3 February'''
|style='text-align:left'|Re-numbered from Service 41A as a service between Chai Chee Ter and Redhill Cl Ter.
|-
|rowspan=2|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Sims Ave and Lor 1 Geylang towards Chai Chee Ter with the conversion of Geylang Rd to one-way traffic.
|-
|rowspan=2|'''1979'''
|'''14 October'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Telok Kurau Rd, skipping Still Rd.
|-
|rowspan=2|Chai Chee ↔ Bukit Merah
|'''1981'''
|'''15 November'''
|style='text-align:left'|Integrated with Service 63 and extended to Bt Merah Int.
|-
|'''1985'''
|'''15 September'''
|style='text-align:left'|Integrated with Service 33 and discontinued with the closure of Chai Chee Ter.
|}

==Service 45==
===1st Generation (1971 - 1984)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABS}}
|Kallang Pk ↺ Haig Rd
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Kallang Pk Ter and Haig Rd (Loop) under 1971 Bus Reorganisation.
|-
|rowspan=2|Kallang Pk ↺ Kreta Ayer Rd
|'''9 May'''
|style='text-align:left'|Extended to loop at Kreta Ayer Rd.
|-
|rowspan=4|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|rowspan=3|Chai Chee ↺ Tg Rhu Rd
|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to start from Chai Chee Ter and shortened to loop at Tg Rhu Rd under 1974 Bus Rationalisation.
|-
|'''1979'''
|'''14 October'''
|style='text-align:left'|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'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (Current)===
{{:Bus Service 45}}

==Service 46==
===1st Generation (1971 - 1975)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABS}}
|rowspan=4|Tg Rhu Ter ↺ Kreta Ayer Rd
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Tg Rhu Ter and Kreta Ayer Rd (Loop) under 1971 Bus Reorganisation.
|-
|rowspan=3|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|'''1974'''
|'''8 December'''
|style='text-align:left'|Amended to ply the extended Robinson Rd, skipping Market St.
|-
|'''1975'''
|'''22 June'''
|style='text-align:left'|Discontinued.
|}

===2nd Generation (1978 - 1981)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{SBS}}
|rowspan=2|Geylang Fringe Car Pk ↺ Stadium Wk
|'''1978'''
|'''1 April'''
|style='text-align:left'|Introduced between Geylang Fringe Car Pk and Stadium Wk (Loop).
|-
|'''1981'''
|'''11 November'''
|style='text-align:left'|Discontinued.
|}

===3rd Generation (Current)===
{{:Bus Service 46}}

==Service 47 (Current)==
{{:Bus Service 47}}

==Service 48 (Current)==
{{:Bus Service 48}}

==Service 49 (Current)==
{{:Bus Service 49}}

==Service 50==
===1st Generation (1971 - 1991)===
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|rowspan=2|{{ABS}}
|Kaki Bukit ↔ Prince Edward
|rowspan=2|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Kaki Bt Ter and Prince Edward Ter under 1971 Bus Reorganisation.
|-
|rowspan=9|Kaki Bukit ↔ Lengkok Bahru
|'''9 May'''
|style='text-align:left'|Extended to Lengkok Bahru Ter.
|-
|rowspan=18|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|rowspan=2|'''1974'''
|'''3 February'''
|style='text-align:left'|Amended to ply Sims Ave and Paya Lebar Rd under 1974 Bus Rationalisation, skipping Geylang Rd and Changi Rd.
|-
|'''8 December'''
|style='text-align:left'|Amended to skip Market St.
|-
|rowspan=2|'''1975'''
|'''2 February'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to ply Geylang Rd towards Lengkok Bahru Ter with the conversion of Sims Ave to one-way traffic.
|-
|'''1976'''
|'''15 February'''
|style='text-align:left'|Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
|-
|'''1978'''
|'''15 January'''
|style='text-align:left'|Amended to ply Jln Sultan, skipping Sumbawa Rd.
|-
|rowspan=2|'''1979'''
|'''11 February'''
|style='text-align:left'|Amended to ply the extended Shenton Way towards Lengkok Bahru Ter, skipping Parsi Rd and Anson Rd.
|-
|rowspan=4|Kaki Bukit ↔ Bukit Merah
|'''23 December'''
|style='text-align:left'|Amended to Bt Merah Ctrl Ter.
|-
|rowspan=2|'''1980'''
|'''20 January'''
|style='text-align:left'|Amended to ply Spottiswoode Pk Rd with the partial conversion of Cantonment Rd to one-way traffic.
|-
|'''28 September'''
|style='text-align:left'|Amended to Bt Merah Int.
|-
|'''1981'''
|'''11 October'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to Jln Eunos Ter.
|-
|rowspan=4|Eunos ↔ Bukit Merah
|rowspan=2|'''1987'''
|'''22 March'''
|style='text-align:left'|Amended to Eunos Ter.
|-
|'''6 April'''
|style='text-align:left'|Skips removed bus stop before College Rd along Outram Rd.
|-
|'''1989'''
|'''10 December'''
|style='text-align:left'|Amended to Eunos Int.
|-
|'''1991'''
|'''6 January'''
|style='text-align:left'|Discontinued under TransitLink Network Integration Exercise Phase 1.
|}

===2nd Generation (Current)===
{{:Bus Service 50}}

==Service 50A (1971 - 1974)==
{| class="wikitable" style='text-align:center'
!style={{CSS/PAST|xfc=|xbc=}}|Operator
!style={{CSS/PAST|xfc=|xbc=}}|Route
!style={{CSS/PAST|xfc=|xbc=}}|Year
!style={{CSS/PAST|xfc=|xbc=}}|Date
!style={{CSS/PAST|xfc=|xbc=}}|Service changes
|-
|{{ABS}}
|rowspan=3|Kaki Bt ↺ Stamford Rd
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Kaki Bt Ter and Stamford Rd (Loop) under 1971 Bus Reorganisation.
|-
|rowspan=2|{{SBS}}
|'''1973'''
|'''1 July'''
|style='text-align:left'|Operations transferred to Singapore Bus Services.
|-
|'''1974'''
|'''3 February'''
|style='text-align:left'|Extended to Alexandra Rd (Alexandra Hosp) Ter and re-numbered Service 53 under 1974 Bus Rationalisation.
|}

[[Category: Buses]]