History of Services 101 - 150

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Service 101

1st Generation (1971 - 1990)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ New Bridge Rd	1971	11 April	Introduced between Serangoon Gdn Ter and New Bridge Rd Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to ABS.
		1972	18 June	Amended to ply Bendemeer Rd towards New Bridge Rd Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	1 October	Serves new merged bus stop outside Sri Srinivasa Perumal Tp along Serangoon Rd.
		1977	31 October	Amended to skip Chartwell Dr, Burghley Dr and Berwick Dr with the introduction of Service 217.
		1981	10 May	Skips bus stop before Braddell Flyover along Lor Chuan.
		1983	6 February	Amended to ply CTE towards Serangoon Gdn Ter with the closure of temporary slip road between Braddell Rd and Lor Chuan.
			20 June	Amended back to ply Lor Chuan towards Serangoon Gdn Ter with the opening of new link road between Braddell Rd and Lor Chuan under Braddell Flyover.
		1987	3 May	Amended to terminate at New Bridge Rd Ter.
			6 June	Amended to the relocated New Bridge Rd Ter.
			27 September	Amended to ply the extended Eu Tong Sen St towards Serangoon Gdn Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Serangoon Gdn Ter to facilitate the second stage of road expansion along New Bridge Rd.
	Serangoon ↔ New Bridge Rd	1988	13 March	Amended to Serangoon Int.
			20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1990	2 September	Integrated with Service 83 and discontinued.

2nd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	Serangoon ↺ Buangkok Cres	2004	15 February	Introduced between Serangoon Int and Buangkok Cres (Loop), replacing Service 328.
	Serangoon ↺ Buangkok Lk	2005	14 August	Amended to loop at Buangkok Lk, skipping Buangkok Cres.
		2009	19 April	Serves new pair of bus stops outside Blk 834 and outside Hougang Polyclinic along Hougang Ave 4.
		2011	3 September	Amended to Serangoon Integrated Transport Hub.
			3 December	Designated wheelchair-accessible bus service (WAB).
		2017	9 July	Serves new pair of bus stops outside and opposite Blk 991B along Buangkok Lk.
		2018	23 December	Serves new bus stop opposite Blk 984A along Buangkok Lk.
	Serangoon ↺ Buangkok Cres	2019	25 August	Amended to loop at Buangkok Cres after Buangkok Lk.
		2022	13 March	Serves new bus stop outside Blk 991A along Buangkok Cres.

Service 101A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ New Bridge Rd	1971	11 April	Introduced between Serangoon Gdn Ter and New Bridge Rd Ter under 1971 Bus Reorganisation.
Associated Bus Services			6 December	Operations transferred to ABS.
		1972	18 June	Amended to ply Bendemeer Rd towards New Bridge Rd Ter with the conversion of Serangoon Rd to one-way road.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Discontinued under 1974 Bus Rationalisation.

Service 102

1st Generation (1971 - 1977)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ Prince Edward	1971	11 April	Introduced between Serangoon Gdn Ter and Prince Edward Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to UBC.
		1972	18 June	Amended to ply Bendemeer Rd towards Prince Edward Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Converted to semi-express service under 1974 Bus Rationalisation.
			8 December	Amended to ply the extended Robinson Rd, skipping Market St.
		1976	15 February	Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
			14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1977	31 October	Discontinued.

2nd Generation (1981 - 1983)

Operator	Route	Year	Date	Service changes
	Jln Kayu ↔ New Bridge Rd	1981	2 March	Introduced between Jln Kayu Ter and New Bridge Rd Ter, operating on weekdays and Saturdays only.
		1983	14 November	Discontinued.

3rd Generation (Current)

Operator	Route	Year	Date	Service changes
(Current)	Hougang Ctrl ↺ Jln Kayu	2015	20 September	Introduced between Hougang Ctrl Int and Jln Kayu (Loop) under the LTA's Bus Service Enhancement Programme (BSEP), operating between 0545 hrs and 2330 hrs daily. Wheelchair-accessible bus service (WAB) at launch.
	Hougang Ctrl ↺ Seletar Aerospace Ave	2018	14 October	Extended to loop at Seletar Airport PTB.
		2019	22 September	Serves new pair of bus stops opposite and after Seletar Camp along Seletar Aerospace Dr.
		2022	29 May	Amended to ply Fernvale Rd, Sengkang West Ave, Sengkang West Rd and Sengkang West Way, skipping a portion of Sengkang West Way.
				First bus brought forward to 0530 hrs daily.
	102Hougang Ctrl ↺ Seletar Aerospace Ave 102ASengkang East Way → Sengkang West	2023	27 March	102AIntroduced as a short-trip service from Sengkang East Way (Sengkang Stn) to Sengkang West Way (Opp Blk 461B) during evening peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.
	102Hougang Ctrl ↺ Seletar Aerospace Ave 102ASengkang East Way → Sengkang West 102BSengkang West Way → Sengkang East		9 October	102BIntroduced as a short-trip service from Sengkang West Way (Blk 461B) to Sengkang East Way (Opp Sengkang Stn/Blk 260A) during morning peak hours on weekdays. Wheelchair-accessible bus service (WAB) at launch.

=Service 102A (1971 - 1974)

Operator	Route	Year	Date	Service changes
Singapore Traction Company	Serangoon Garden ↔ Prince Edward	1971	11 April	Introduced between Serangoon Gdn Ter and Prince Edward Ter under 1971 Bus Reorganisation.
United Bus Company			6 December	Operations transferred to UBC.
		1972'	18 June	Amended to ply Bendemeer Rd towards Prince Edward Ter with the conversion of Serangoon Rd to one-way traffic.
		1973	1 July	Operations transferred to Singapore Bus Services.
		1974	3 February	Re-numbered Service 105 under 1974 Bus Rationalisation.