History of Services 181 - 190

Service 181

Operator	Service Gen	Year	Date	Service changes
UBC	1st Gen (1971 - 1998)	1971	11 April	Introduced between Bt Timah Ter and Commonwealth Ave Ter under 1971 Bus Reorganisation.
			8 November	Extended to Upp Bt Timah Rd Ter.
		1972	11 June	Amended to ply Upp Cross St with the partial conversion of Havelock Rd to one-way traffic, skipping Upp Hokien St.
		1974	3 February	Extended to Crawford St Ter under 1974 Bus Rationalisation.
		1979	30 December	Amended to ply Jln Anak Bt towards Crawford St Ter with the partial conversion of Upp Bt Timah Rd to one-way traffic.
		1980	14 December	Extended to Admiralty Rd Ter.
		1981	29 November	Amended to Woodlands Int.
		1983	4 September	Operations transferred to TIBS.
		1987	27 September	Amended to ply the extended Eu Tong Sen St towards Crawford St Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Crawford St Ter to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop opposite Peninsula Plaza along North Bridge Rd, skipping the bus stop outside St Andrew's Cathedral.
		1988	28 February	Revised to operate on weekdays and Saturdays only with the introduction of Service 181#.
			20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1990	22 July	Serves additional bus stop outside Ellenborough Market along Eu Tong Sen St.
		1996	4 February	Amended to Woodlands Reg Int.
		1997	7 December	Amended to ply South Bridge Rd, Neil Rd and Cantonment Rd with the partial closure of New Bridge Rd to facilitate the construction of Chinatown MRT station on the North East MRT Line.
		1998	27 December	Extended to Lor 1 Geylang Ter and re-numbered Service 961.
Template:SBS Transit (Current)	2nd Gen (Since 2005)	2005	9 January	Re-introduced between Boon Lay Int and Jurong West Ave 3 (Loop).
		2006	18 June	Amended to Boon Lay Temp Int.
		2008	15 June	Serves new pair of bus stops outside Blk 670A and outside Blk 678D along Jurong West St 64.
		2009	27 December	Amended to Boon Lay Integrated Transport Hub.
		2010	18 October	Designated wheelchair-accessible bus service (WAB).

Service 181#

Operator	Year	Date	Service changes
	1988	28 February	Introduced between Woodlands Int and Crawford St Ter as an alternate route of Service 181 via Marina Centre, operating on Sundays and Public Holidays.
		20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
	1990	22 July	Serves additional bus stop outside Ellenborough Market along Eu Tong Sen St.
	1996	4 February	Amended to Woodlands Reg Int.
	1997	7 December	Amended to ply South Bridge Rd, Neil Rd and Cantonment Rd with the partial closure of New Bridge Rd to facilitate the construction of Chinatown MRT station on the North East MRT Line.
	1998	27 December	Extended to Lor 1 Geylang Ter and re-numbered Service 961#.

Service 181M

Operator	Year	Date	Service changes
Template:SBS Transit (Current)	2016	21 March	Introduced between Boon Lay Integrated Transport Hub and Jurong West St 23 (Loop) as a peak hour service on weekdays (except school holidays).

Service 182

Operator	Service Gen	Year	Date	Service changes
UBC	1st Gen (1971 - 1996)	1971	11 April	Introduced between Bt Timah Ter and Jln Besi Ter under 1971 Bus Reorganisation.
			TBC	Extended to Benoi Rd 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.
		1974	3 February	Amended to loop at Shenton Way under 1974 Bus Rationalisation.
			24 February	Amended to ply Grange Rd and Orchard Blvd with the conversion of Orchard Rd to one-way traffic, skipping Orchard Rd.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1976	6 June	Extended to Admiralty Rd Ter and amended to New Bridge Rd Ter.
		1979	30 December	Amended to ply Jln Anak Bt towards New Bridge Rd Ter with the partial conversion of Upp Bt Timah Rd to one-way traffic.
		1983	7 August	Operations transferred to TIBS.
		1987	6 June	Amended to the relocated New Bridge Rd Ter.
			27 September	Amended to ply the extended Eu Tong Sen St towards Marsiling Ter to facilitate the first stage of road expansion along New Bridge Rd.
			1 November	Amended to ply Eu Tong Sen St towards Marsiling Ter to facilitate the second stage of road expansion along New Bridge Rd.
			13 December	Serves new staggered bus stop outside Orchard Stn along Orchard Blvd, skipping the bus stop opposite Orchard Stn.
				Serves new bus stop outside Newton Stn along Scotts Rd.
		1988	20 March	Amended to ply Upp Cross St and New Bridge Rd, skipping Neil Rd.
		1992	3 May	Amended to Shenton Way Ter under TransitLink Network Integration Exercise Phase 7.
			TBC	Amended to ply Orchard Link, skipping Grange Rd.
		1995	TBC	Amended to ply Orchard Turn.
		1996	4 February	Amended to Woodlands Reg Int.
			10 March	Withdrawn under Woodlands MRT Rationalisation.
	2nd Gen (Since 1998)	1998	5 July	Re-introduced between Jurong East Int and Tuas Ter, calling at Tuas Checkpoint at selected timings only.
		2001	25 February	Shortened to Boon Lay Int.
Template:SBS Transit (Current)		2002	26 May	Integrated with Service 183, extended to loop at Tuas South Ave 9 and amended to ply Jurong West St 64, Boon Lay Way, Upp Jurong Rd and PIE, skipping Jln Boon Lay.
		2004	19 January	Serves all bus stops along Upp Jurong Rd.
		2005	7 August	Serves new pair of bus stops outside and opposite Sin Lian Heng Construction along Tuas South Ave 3.
		2006	18 June	Amended to Boon Lay Temp Int.
		2007	25 November	Serves 2 new pairs of bus stops before Tuas South Ave 2, outside LTH Distripark, before and after Tuas South Ave 2 along Tuas South Ave 3.
		2009	27 December	Amended to Boon Lay Integrated Transport Hub.
		2013	30 September	Designated wheelchair-accessible bus service (WAB).
		2015	28 November	Shortened to Joo Koon Integrated Transport Hub.

Service 182X/182M

Operator	Year	Date	Service changes
	1998	5 July	Introduced between Jurong East Int and Tuas Ter as an alternate route of Service 182 during off peak periods, skipping Tuas Checkpoint in both directions.
	2001	25 February	Shortened to Boon Lay Int.
Template:SBS Transit (Current)	2002	26 May	Integrated with Service 183, extended to loop at Tuas South Ave 9 and amended to ply Jurong West St 64, Boon Lay Way, Upp Jurong Rd and PIE, skipping Jln Boon Lay.
	2004	19 January	Serves all bus stops along Upp Jurong Rd.
	2005	7 August	Serves new pair of bus stops outside and opposite Sin Lian Heng Construction along Tuas South Ave 3.
	2006	18 June	Amended to Boon Lay Temp Int.
	2008	28 January	Re-numbered Service 182M.
		11 February	Serves 2 new pairs of bus stops before Tuas South Ave 2, outside LTH Distripark, before and after Tuas South Ave 2 along Tuas South Ave 3.
	2009	27 December	Amended to Boon Lay Integrated Transport Hub.
	2013	26 August	Amended to call at Tuas Checkpoint towards Boon Lay Integrated Transport Hub only.
		30 September	Designated wheelchair-accessible bus service (WAB).
	2015	28 November	Shortened to Joo Koon Integrated Transport Hub.

Service 183

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1974 - 1988)	1974	3 February	Introduced between Benoi Rd Ter and South Canal Ter under 1974 Bus Rationalisation.
		1978	1 June	Amended to Jurong Int and amended to New Bridge Rd Ter.
		1987	6 April	Skips abolished bus stop before College Rd along Outram Rd.
			6 June	Amended to the relocated New Bridge Rd Ter.
			1 November	Amended to ply Eu Tong Sen St towards Jurong Int to facilitate the second stage of road expansion along New Bridge Rd.
		1988	11 January	Serves merged bus stop along Ayer Rajah Rd.
			18 December	Withdrawn.
	2nd Gen (1998 - 2002)	1998	5 July	Re-introduced between Tuas Ter and Tuas South Ave 6 (Loop).
		2001	11 February	Extended to loop at Tuas South Ave 9, skipping Tuas South Ave 6.
Template:SBS Transit		2002	26 May	Integrated with Service 182 and withdrawn.
	3rd Gen (Since 2004)	2004	22 August	Re-introduced between Jurong East Int and Kent Ridge Ter (Loop).
		2005	3 October	Extended to loop at Science Park Rd, skipping Kent Ridge Ter.
		2008	2 December	Designated wheelchair-accessible bus service (WAB).
		2011	17 December	Amended to Jurong East Temp Int.
Template:Tower Transit Singapore (Current)		2016	26 June	Operations transferred to Tower Transit Singapore.
		2020	6 December	To be amended to relocated Jurong East Temp Int and serve new bus stop before Jurong East Stn along Jurong Gateway Rd.

Service 183B

Operator	Year	Date	Service changes
Template:SBS Transit	2010	16 August	Introduced as a short-trip service between Jurong East Int and Toh Tuck Ave (Ulu Pandan R.I. Plant) during morning peak hours on weekdays. Wheelchair-accessible at launch.
	2011	17 December	Amended to Jurong East Temp Int.
Template:Tower Transit Singapore (Current)	2016	26 June	Operations transferred to Tower Transit Singapore.
	2020	6 December	To be amended to relocated Jurong East Temp Int.

Service 184

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1978 - 1990)	1978	TBC	Introduced between Telok Blangah Way Ter and Boon Lay Gardens Ter.
			1 June	Amended to Jurong Int.
		1980	28 September	Amended to Bt Merah Int.
		1981	15 February	Amended to skip Telok Blangah Way and Telok Blangah Cres in both directions.
		1987	2 August	Amended to ply West Coast Highway, skipping Upp Ayer Rajah Rd and Clementi Rd.
		1990	1 July	Integrated with Service 176 and withdrawn with the opening of Boon Lay Int.
	2nd Gen (Since 1994)	1994	3 July	Re-introduced between Bt Panjang Ter and Commonwealth Ave West (Loop).
		1995	2 July	Operations transferred to TIBS.
		1999	26 December	Amended to Bt Panjang Int.
		2003	12 October	Serves the bus stop opposite Bt Timah Plaza along Jln Anak Bt with the abolition of the bus stop under the PIE Flyover.
Template:SMRT Buses (Current)		2010	23 May	Skips temporarily abolished bus stop outside Assumption Voc Inst along Upp Bt Timah Rd to facilitate the construction of Cashew MRT station along the Downtown MRT Line.
		2011	3 July	Serves additional pair of bus stops opposite Ministry of Defence and before Cashew Rd along Upp Bt Timah Rd.
		2012	16 December	Amended to start from and terminate at Bt Panjang Rd with the closure of Bt Panjang Int.
		2015	1 March	Serves reinstated bus stop outside Assumption Pathway Sch along Upp Bt Timah Rd, skipping a pair of bus stops opposite Ministry of Defence and before Cashew Rd.
		2017	4 September	Serves additional pair of bus stops outside and opposite Ten Mile Junction Stn along Woodlands Rd.
			17 December	Designated wheelchair-accessible bus service (WAB).

Service 185

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1979 - 1985)	1979	16 July	Introduced between Clementi Ave 3 Ter and North Buona Vista Rd (Loop).
		1980	28 September	Extended to loop at Bt Merah Int.
			16 November	Amended to Clementi Int.
		1985	28 April	Integrated with Service 92 and withdrawn.
	2nd Gen (1988 - 2003)	1988	31 July	Re-introduced between Choa Chu Kang Ter and Shenton Way Ter.
			25 August	Amended to ply Choa Chu Kang Ave 1 with the completion of the road junction between Teck Whye Ave and Choa Chu Kang Ave 1.
		1989	28 May	Amended to ply Commonwealth Ave.
		1990	10 March	Extended to interim terminal along Choa Chu Kang Ave 4.
			8 April	Amended to Choa Chu Kang Int.
		1991	28 April	Amended to ply Bt Batok East Ave 2 under TransitLink Network Integration Exercise Phase 4, skipping Bt Batok East Ave 3.
		1993	3 January	Shortened to loop at Jln Anak Bt from Choa Chu Kang Int with the introduction of Service 186 under TransitLink Network Integration Exercise Phase 11.
		1997	TBC	Serves new bus stop outside Lot 1 Shoppers' Mall along Choa Chu Kang Ave 4.
		1999	29 August	Operations transferred to TIBS.
		2003	TBC	Serves new bus stop outside Goh & Goh Bldg along Jln Jurong Kechil.
			27 July	Integrated with Service 989 to form Service 985 and withdrawn.
Template:SBS Transit (Current)	3rd Gen (Since 2006)	2006	26 December	Re-introduced between Soon Lee Bus Park and Buona Vista Ter.
		2007	5 August	Serves new pair of bus stops outside and opposite Soon Lee Depot along Soon Lee Rd.
		2008	14 July	Designated wheelchair-accessible bus service (WAB).

Service 186

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1977 - 1989)	1977	7 November	Introduced between Clementi Ave 3 Ter and Tg Pagar Ter.
		1979	1 August	Amended to Anson Rd Ter.
		1980	16 November	Amended to Clementi Int.
		1985	27 January	Amended to Prince Edward Ter with the closure of Anson Rd Ter.
		1987	28 June	Amended to Shenton Way Ter.
		1988	8 March	Amended to ply Clementi Ave 3 with the abolition of right turning from Clementi Ave 3 to Commonwealth Ave West.
		1989	27 August	Integrated with Service 145 and withdrawn.
	2nd Gen (Since 1993)	1993	3 January	Re-introduced between Shenton Way Ter and Farrer Rd (Loop) under TransitLink Network Integration Exercise Phase 11.
			4 April	Extended to St. Michael's Ter under TransitLink Network Integration Exercise Phase 12.
		2000	TBC	Serves new bus stop after Shenton Way along Palmer Rd.
Template:SBS Transit (Current)		2004	TBC	Skips abolished bus stop outside Nanyang Pr Sch along Farrer Rd.
		2011	4 September	Serves new bus stop outside Botanic Gdns Stn along Bt Timah Rd.
		2012	30 September	Designated wheelchair-accessible bus service (WAB).
		2014	27 April	Serves new bus stop outside Queens Condo along Commonwealth Ave.
		2017	25 June	Amended to the relocated Shenton Way Ter.

Service 187

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1981 - 1983)	1981	16 February	Introduced between Bt Merah Int and Empress Pl (Loop), operating on weekdays and Saturdays only.
			19 May	Converted to peak hour service.
		1983	14 November	Withdrawn.
	2nd Gen (Since 1988)	1988	10 July	Re-introduced between Bt Panjang Ter and Jurong Int.
		1990	7 January	Serves new pair of bus stops outside and opposite Bt Batok Driving Ctr along Bt Batok West Ave 5.
			1 July	Amended to Boon Lay Int.
		1995	17 September	Operations transferred to TIBS.
		1996	10 March	Extended to Woodlands Reg Int under Woodlands MRT Rationalisation.
Template:SMRT Buses (Current)		2006	18 June	Amended to Boon Lay Temp Int.
			TBC	Serves new pair of bus stops outside Blk 336 and opposite Blk 334 along Bt Batok West Ave 7.
		2009	27 December	Amended to Boon Lay Integrated Transport Hub.
		2012	29 April	Designated wheelchair-accessible bus service (WAB).
		2016	12 March	Amended to Woodlands Temp Int.

Service 188

Operator	Service Gen	Year	Date	Service changes
	1st Gen (1977 - 1987)	1977	17 October	Introduced between Ulu Pandan Ter and Shenton Way (Loop).
		1979	11 February	Amended to ply the extended Shenton Way towards Ulu Pandan Ter, skipping Parsi Rd and Anson Rd.
		1980	20 January	Amended to ply Spottiswoode Park Rd with the partial conversion of Cantonment 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.
		1987	6 April	Skips abolished bus stop before College Rd along Outram Rd.
			5 July	Withdrawn.
	2nd Gen (1988 - 1991)	1988	10 July	Re-introduced between Jurong Int and Jurong West St 91 (Loop).
		1989	17 December	Amended to ply Jurong West St 72 and Jurong West Ave 5, skipping Pioneer Rd North.
		1990	1 July	Amended to Jurong Bus Park with the opening of Boon Lay Int.
		1991	20 January	Withdrawn under TransitLink Network Integration Exercise Phase 2.
	3rd Gen (Since 1999)	1999	7 March	Re-introduced between Choa Chu Kang Int and World Trade Ctr Ter.
			TBC	Skips abolished pair of bus stops outside and opposite Wishart Rd along Telok Blangah Rd.
			26 December	Operations transferred to TIBS.
		2002	TBC	Skips abolished bus stop opposite ITE Pasir Panjang along Telok Blangah Rd.
Template:SMRT Buses (Current)		2006	TBC	Serves new pair of bus stops outside Blk 336 and opposite Blk 334 along Bt Batok West Ave 7.
		2015	22 March	Designated wheelchair-accessible bus service (WAB).
		2018	16 December	Amended to new Choa Chu Kang Int.

Service 189

Operator	Year	Date	Service changes
	1974	3 February	Re-numbered from Service 193A as a service between Commonwealth Ave Ter and South Canal Rd Ter under 1974 Bus Rationalisation.
		8 December	Amended to ply Cecil St, skipping Robinson Rd.
	1979	15 January	Amended to loop at Empress Pl and amended to ply Commonwealth Ave, Alexandra Rd, Lower Delta Rd, Jln Bt Merah and Kg Bahru Rd.
		11 February	Amended to ply the extended Shenton Way towards Commonwealth Ave Ter, skipping Parsi Rd and Anson Rd.
	1980	20 January	Amended to ply Spottiswoode Park Rd with the partial conversion of Cantonment Rd to one-way traffic.
	1982	TBC	Amended to Buona Vista Ter.
	1985	24 November	Extended to Bt Batok Ter and Marina Ctr Ter.
	1986	30 November	Amended to the relocated Marina Ctr Ter along Raffles Blvd.
	1987	27 September	Amended to Bt Batok Int.
		1 November	Amended to ply Eu Tong Sen St towards Marina Ctr Ter to facilitate the second stage of road expansion along New Bridge Rd.
	1991	28 April	Shortened to loop at Clementi West St 2, integrated with Service 366 and amended to ply Bt Batok Central, Bt Batok Ave 1, Bt Batok East Ave 6 and Bt Batok St 23 under TransitLink Network Integration Exercise Phase 4.
	1995	6 May	Extended to loop at West Coast Ferry Ter, skipping Clementi West St 2.
	1996	TBC	Amended to ply PIE and Clementi Ave 6, skipping Toh Tuck Ave.
	1999	TBC	Serves new pair of bus stops outside and opposite West Bay Resort Condo along West Coast Rd.
	2000	18 June	Operations transferred to TIBS.
	2001	15 April	Shortened to loop at Kent Ridge Ter.
Template:SMRT Buses	2009	1 June	Designated wheelchair-accessible bus service (WAB).
	2014	23 November	Amended to loop at Clementi Ave 1 with the introduction of Service 201, skipping West Coast Rd and Kent Ridge Ter.
Template:Tower Transit Singapore (Current)	2016	29 May	Operations transferred to Tower Transit Singapore.

Service 189A

Operator	Service Gen	Year	Date	Service changes
	1st Gen (2001 - 2003)	2001	15 April	Introduced between Bt Batok Int and Harbour Dr (Loop), operating at selected timings only.
		2003	4 May	Withdrawn.
Template:SMRT Buses	2nd Gen (Since 2009)	2009	5 January	Re-introduced as a short-trip service from Bt Batok Int to Bt Batok St 23 (Opp Midview Bldg) during morning peak hours on weekdays.
			1 June	Designated wheelchair-accessible bus service (WAB).
		2011	12 June	Extended to operate after the last bus of Service 189 daily.
Template:Tower Transit Singapore (Current)		2016	29 May	Operations transferred to Tower Transit Singapore.

Service 190

Operator	Service Gen	Year	Date	Service changes
ABC	1st Gen (1971)	1971	11 April	Introduced between Delta Circus Ter and South Canal Ter under 1971 Bus Reorganisation.
			25 April	Integrated with Service 193/193A and withdrawn.
	2nd Gen (1974 - 1979)	1974	3 February	Re-numbered from Service 191A between Jln Bt Merah Ter and Prince Edward Rd Ter under 1974 Bus Rationalisation.
			24 February	Amended to ply Grange Rd and Orchard Blvd with the conversion of Orchard Rd to one-way traffic, skipping Orchard Rd and Tanglin Rd.
			8 December	Amended to ply Cecil St, skipping Robinson Rd.
		1976	14 March	Serves new staggered bus stop outside The Cenotaph along Connaught Dr, skipping the bus stop opposite Singapore Cricket Club.
		1979	25 November	Withdrawn.
	3rd Gen (Since 1988)	1988	10 July	Re-introduced between Bt Panjang Ter and New Bridge Rd Ter.
		1990	16 December	Integrated with Service 179 and extended to Choa Chu Kang Int.
		1992	TBC	Amended to ply Orchard Link, skipping Grange Rd.
		1993	3 January	Amended to ply PIE and Whitley Rd under TransitLink Network Integration Exercise Phase 11, skipping Jln Anak Bt/Upp Bt Timah Rd and Dunearn Rd/Bt Timah Rd.
			11 April	Amended to ply Victoria St, Hill St and New Bridge Rd, skipping North Bridge Rd, South Bridge Rd and Upp Cross St.
		1995	TBC	Amended to ply Orchard Turn.
		1997	7 December	Amended to ply Upp Pickering St, South Bridge Rd and Kreta Ayer Rd with the partial closure of New Bridge Rd to facilitate the construction of Chinatown MRT station on the North East MRT Line.
		1999	25 July	Operations transferred to TIBS.
			26 December	Amended to ply Choa Chu Kang Ave 4, Choa Chu Kang Dr and Teck Whye Ave under Bukit Panjang LRT Rationalisation, skipping Choa Chu Kang Way.
		2000	TBC	Serves additional bus stop opposite Blk 333 along Kreta Ayer Rd.
		2002	20 April	Amended to ply the reinstated New Bridge Rd, skipping Upp Pickering St, South Bridge Rd and Kreta Ayer Rd.
			7 July	Skips the bus stop outside Orchard Emerald along Orchard Rd.
Template:SMRT Buses (Current)		2005	TBC	Serves additional bus stop outside Clarke Quay Stn along Eu Tong Sen St.
			2 July	Amended to ply Grange Rd and Orchard Link with the partial closure of Somerset Rd.
		2006	29 October	Serves relocated bus stop outside Orchard Stn along Orchard Turn.
		2015	14 June	Designated wheelchair-accessible bus service (WAB).
		2018	10 March	Extended to Kg Bahru Ter with the closure of New Bridge Rd Ter.
			16 December	Amended to new Choa Chu Kang Int.

Service 190A

Operator	Year	Date	Service changes
	2000	TBC	Introduced as a short-trip service between Choa Chu Kang Int and Orchard Rd (Dhoby Ghaut Stn) during morning peak hours on weekdays.
	2002	7 July	Skips the bus stop outside Orchard Emerald along Orchard Rd.
Template:SMRT Buses (Current)	2015	14 June	Designated wheelchair-accessible bus service (WAB).
	2018	16 December	Amended to new Choa Chu Kang Int.