History of Services 400 - 450

Service 400

Operator	Year	Date	Service changes
	1989	30 July	Introduced between Shenton Way Ter and Marina Mall (Loop).
	2000	TBC	Serves new bus stop after Shenton Way along Palmer Rd.
Template:SBS Transit (Current)	2005	14 November	Re-classified as a Parks service.
	2008	7 January	Amended to skip the western loop of Marina Mall, Marina Way and Marina Grove.
		19 October	Amended to loop at Marina Mall, skipping the eastern loop of Marina Way and Marina Grove.
	2009	18 January	Serves relocated bus stop outside Marina Bay Stn along Marina Station Rd with the partial closure of Marina St to facilitate the construction of the Downtown MRT Line.
		16 March	Reverted back to trunk service.
		19 July	Extended to loop at Marina Gardens Dr.
	2011	27 June	Designated wheelchair-accessible bus service (WAB).
	2012	14 January	Serves reinstated bus stop outside Marina Bay Stn along Marina St.
		24 June	Amended to ply the extended Marina Gardens Dr with the permanent closure of Marina Mall.
			First bus brought forward to 0700 hrs daily.
	2013	29 December	Amended to ply Marina Blvd/Central Blvd, Marina St, Central Blvd and Shenton Way with the opening of MCE.
	2014	28 September	Amended to ply Cecil St and Marina Blvd with the road changes in Marina South area, skipping Maxwell Rd and Central Blvd.
	2017	25 June	Amended to the relocated Shenton Way Ter.
	2019	16 June	Integrated with Service 402 and extended to loop at Marina Coastal Dr.
			First bus brought forward to 0600 hrs daily and last bus extended to 2340 hrs daily.

Service 401

Operator	Year	Date	Service changes
	1976	24 October	Introduced between Chai Chee Ter and East Coast Park (Loop), operating on Sundays and Public Holidays only.
	1977	4 September	Amended to loop at Amber Rd via Tg Katong Rd and Mountbatten Rd, skipping Still Rd South, Marine Parade Rd, Joo Chiat Rd and East Coast Rd.
	1980	23 July	Amended to ply Bedok South Rd, skipping Bedok South Ave 1.
	1985	8 September	Amended to Bedok Int with the closure of Chai Chee Ter.
		1 December	Serves new bus stop outside East Coast Park Recreational Ctr along East Coast Park Service Rd.
	1986	29 June	Serves new pair of bus stops along East Coast Park Service Rd.
		27 July	Amended to ply East Coast Park Service Rd, Fort Rd and Mountbatten Rd.
	1989	3 September	Extended to loop at Fort Rd and ply East Coast Park Service Rd in both directions.
	1997	21 September	Extended to Lor 1 Geylang Ter and amended to ply New Upp Changi Rd, Siglap Rd and Marine Parade Rd, skipping Bedok South Rd and Bedok South Ave 1.
Template:SBS Transit (Current)	2003	7 June	Extended to loop at Tomlinson Rd on a trial basis and enhanced to operate on Saturdays.
		TBC	Serves additional bus stop opposite Mandarin Gdns along Siglap Rd.
	2004	20 April	Amended to ply Mountbatten Rd, Geylang Rd, Kallang Rd, Victoria St, Jln Sultan and Beach Rd to facilitate reinstatement works for the collapsed Nicoll Highway.
		4 December	Shortened to loop at Fort Rd.
	2005	14 November	Re-classified as a Parks service.
	2006	19 March	Amended to ply Cassia Link, Cassia Cres, Guillemard Rd and Guillemard Camp Rd with the partial closure of Old Airport Rd and Dunman Rd to facilitate the construction of Dakota MRT station on the Circle MRT Line.
		TBC	Serves additional bus stop outside Victoria Sch along Marine Parade Rd.
	2008	29 December	Amended to ply the reinstated Old Airport Rd and Dunman Rd, skipping Cassia Link, Guillemard Rd and Guillemard Camp Rd.
	2009	16 March	Reverted back to trunk service.
	2011	19 November	Amended to Bedok Temp Int.
	2014	30 November	Amended to Bedok Integrated Transport Hub.
	2017	21 August	Designated wheelchair-accessible bus service (WAB).
	2020	25 April	Temporarily suspended due to COVID-19 Circuit Breaker measures in Singapore until 1 June 2020.
		2 June	Temporary suspension of service due to COVID-19 Circuit Breaker measures in Singapore extended until further notice.
	2022	4 June	Resumed normal operations.

Service 402 (1975 - 1982)

Operator	Year	Date	Service changes
	1975	11 May	Introduced between Stamford Rd (Capitol Theatre) and Bukit Timah Race Course (Loop), operating on racing days that fall on Sundays only.
	1982	28 February	Withdrawn.

Service 402 (2006 - 2019)

Operator	Year	Date	Service changes
Template:SBS Transit	2006	1 April	Introduced between Marina South Pier Ter and Anson Rd (Loop).
	2009	18 January	Serves relocated bus stop outside Marina Bay Stn along Marina Station Rd with the partial closure of Marina St to facilitate the construction of the Downtown MRT Line.
	2011	27 June	Designated wheelchair-accessible bus service (WAB).
		28 November	Amended to start from Shenton Way Ter and loop at Marina Coastal Dr.
	2012	14 January	Serves reinstated bus stop outside Marina Bay Stn along Marina St.
		13 May	Serves new bus stop outside International Cruise Ter along Marina Coastal Dr.
	2013	21 April	Serves new bus stop opposite Marina South Pier along Marina Coastal Dr.
		29 December	Amended to ply Marina Blvd/Central Blvd, Marina St, Central Blvd and Shenton Way with the opening of MCE.
	2014	28 September	Amended to ply Cecil St and Marina Blvd with the road changes in Marina South area, skipping Maxwell Rd and Central Blvd.
	2017	25 June	Amended to the relocated Shenton Way Ter.
	2019	16 June	Integrated with Service 400 and withdrawn.

Service 403

Operator	Year	Date	Service changes
	1977	3 April	Introduced between Pasir Ris Rd Ter and Tampines Rd (Loop), operating on Sundays and Public Holidays only.
	1989	22 October	Amended to loop at Pasir Ris Dr 1 and enhanced to operate on weekdays and Saturdays.
		10 December	Amended to loop at Pasir Ris Town Centre Rd.
	1990	18 May	Amended to start from Pasir Ris Int and loop at Pasir Ris Rd.
Template:SBS Transit	2005	14 November	Re-classified as a Parks service.
	2006	20 May	Serves new pair of bus stops outside Blk 638 and outside Blk 613 along Elias Rd.
	2009	16 March	Reverted back to trunk service.
	2011	3 December	Designated wheelchair-accessible bus service (WAB).
	2012	29 April	Serves new bus stop outside Blk 612 along Pasir Ris Dr 1.
(Current)	2016	18 September	Operations transferred to Go-Ahead Singapore.
			First bus brought forward to 0600 hrs daily.

Service 404

Operator	Year	Date	Service changes
	1978	4 June	Introduced between Jurong Int and Science Centre Rd (Loop), operating on Saturdays, Sundays and Public Holidays only.
	1980	15 June	Withdrawn.

Service 405 (1978 - 1979)

Operator	Year	Date	Service changes
	1978	4 June	Introduced between Jurong Int and Jln Ahmad Ibrahim (Jurong Bird Park) (Loop), operating on Saturdays, Sundays and Public Holidays only.
	1979	23 December	Withdrawn.

Service 405 (since 1993)

Operator	Year	Date	Service changes
	1993	18 July	Introduced between Boon Lay Int and Choa Chu Kang Rd End (Loop), operating during Qing Ming period, Good Friday, Ramadan, Hari Raya Puasa, Hari Raya Haji, Deepavali and All Souls' Day only.
	1997	5 April	Enhanced to ply Lim Chu Kang Rd.
Template:SBS Transit (Current)	2006	18 June	Amended to Boon Lay Temp Int.
	2009	27 December	Amended to Boon Lay Integrated Transport Hub and amended to ply Jurong West Central 1, skipping Jurong West Central 3.
	2010	10 February	Serves additional bus stop outside Blk 263 along Jln Boon Lay.
	2015	30 March	Designated wheelchair-accessible bus service (WAB).

Service 406

Operator	Year	Date	Service changes
	1978	4 June	Introduced between Jurong Int and Chinese Garden Rd/Japanese Garden Rd (Loop), operating on Saturdays, Sundays and Public Holidays only.
	1989	22 October	Integrated with Service 199 and withdrawn.

Service 450

Operator	Year	Date	Service changes
	1978	3 June	Introduced between Jurong Int and Pasir Laba Rd (Loop), operating during Saturday afternoons and during the night on Sundays and Public Holidays.
	1990	1 July	Withdrawn with the opening of Boon Lay Int.