Bus Service 171

Service 171
Route Information
Route	Yishun Interchange ↺ Upper Bukit Timah Road (Loop)
Route Length	31.3 km
Travelling Time	75 - 93 mins (1 h 15 mins - 1 h 33 mins)
Operator	(Sembawang – Yishun Bus Package)

Tower Transit Bus Service 171 is an inter-town service linking the residential estate of Yishun and Bukit Panjang via Mandai Road and the Bukit Timah Expressway (BKE). It offers a direct connection between the two towns, providing a comparable travel time to the MRT/LRT.

Service Information

Bus Duty & Fleet

Service 171

Depot	Fleet Size	Fleet
Mandai Depot (MDDEP)	9	Single Deckers	Double Deckers
		MAN NL323F SMB97G Mercedes-Benz OC500LE	Alexander Dennis Enviro500 MAN ND323F

Notes
This service practises jumpbus.

Route Information

Frequency

Period	AM Peak (First Bus - 08:30)	AM Off Peak (08:31 - 16:59)	PM Peak (17:00 - 19:00)	PM Off Peak (19:01 - Last Bus)
Loop Service	09 - 12 minutes			12 - 13 minutes

Special Departures

44731 Opp Blk 180 Jelebu Rd ↺ 44029 Bt Panjang Stn Exit A/LRT Upp Bt Timah Rd → 59009 Yishun Int Yishun Ave 2 Departure Time
Weekdays	05:35 05:42 05:49 05:56

Loop Service

[Show/Hide Full Route Details]

Bus Stops	Point of Interest	Weekdays		Saturdays		Suns / PHs
		First bus	Last bus	First bus	Last bus	First bus	Last bus
59009 Yishun Int(Berth B3) Yishun Ave 2	NS13 Yishun Northpoint City Nee Soon Central CC	05:30	23:30	05:30	23:30	05:30	23:30
59141 Blk 741 Yishun Ave 5		05:33	23:33	05:33	23:33	05:33	23:33
59111 Blk 701 Yishun Ave 5	Chong Pang City	05:35	23:35	05:35	23:35	05:35	23:35
57089 Blk 713 Sembawang Rd		05:36	23:36	05:37	23:37	05:37	23:37
57079 Khatib Camp Sembawang Rd		05:38	23:38	05:38	23:38	05:38	23:38
57069 Opp Dieppe Barracks Sembawang Rd		05:39	23:39	05:39	23:39	05:39	23:39
57059 Opp Sembawang Air Base Sembawang Rd		05:40	23:40	05:40	23:40	05:40	23:40
48149 Mandai Crematorium & Columbarium Mandai Ave	Mandai Crematorium & Columbarium	05:43	23:43	05:43	23:43	05:43	23:43
48069 Aft Mandai Ave Mandai Rd		05:44	23:44	05:44	23:44	05:44	23:44
48059 Opp Mandai Agrotech Pk Mandai Rd		05:45	23:45	05:45	23:44	05:45	23:45
48049 Bef Jln Ulu Sembawang Mandai Rd		05:46	23:46	05:46	23:45	05:46	23:46
48039 LP 159 Mandai Rd		05:46	23:46	05:47	23:46	05:47	23:47
48029 Bef Mandai Lake Rd Mandai Rd		05:47	23:47	05:48	23:46	05:48	23:48
48019 Mandai Camp 2 Mandai Rd		05:48	23:48	05:49	23:47	05:49	23:49
Express BKE		Non-stop
44269 Blk 223 Bt Panjang Rd		05:56	23:54	05:56	23:54	05:55	23:55
44229 Bef Pending Stn Pending Rd	BP8 Pending Bukit Panjang CC	05:57	23:55	05:58	23:55	05:57	23:56
44219 Bet Blks 139/140 Petir Rd		05:59	23:57	06:00	23:57	05:59	23:58
44209 Opp Petir Stn Petir Rd	BP7 Petir	06:00	23:58	06:01	23:58	06:00	23:59
44731 Opp Blk 180 Jelebu Rd	DT1 BP6 Bukit Panjang Bukit Panjang Plaza Hillion Mall	05:35	00:00	06:03	00:00	06:02	00:01
44909 Blk 184 Bt Panjang Rd		05:37	00:02	06:05	00:02	06:04	00:03
44029 Bt Panjang Stn Exit A/LRT Upp Bt Timah Rd	DT1 BP6 Bukit Panjang Hillion Mall	05:38	00:03	06:06	00:03	06:05	00:04
44201 Aft Petir Stn Petir Rd	BP7 Petir	05:41	00:06	06:09	00:06	06:08	00:06
44211 Blk 127 Petir Rd		05:42	00:07	06:10	00:07	06:09	00:07
44221 Opp Pending Stn Pending Rd	BP8 Pending Bukit Panjang CC	05:44	00:09	06:12	00:08	06:11	00:09
44261 Blk 270 Bt Panjang Rd		05:47	00:11	06:14	00:10	06:13	00:11
Express BKE		Non-stop
48011 Opp Mandai Camp 2 Mandai Rd		05:54	00:17	06:21	00:17	06:19	00:17
48021 Aft Mandai Lake Rd Mandai Rd		05:55	00:18	06:22	00:18	06:20	00:18
48031 LP 162 Mandai Rd		05:56	00:19	06:23	00:19	06:21	00:19
48041 Aft Jln Ulu Sembawang Mandai Rd		05:56	00:19	06:24	00:20	06:22	00:20
48051 Mandai Agrotech Pk Mandai Rd		05:57	00:20	06:25	00:21	06:23	00:21
48061 Bef Mandai Ave Mandai Rd		05:58	00:22	06:26	00:22	06:24	00:22
48141 Opp Mandai Crematorium & Columbarium Mandai Ave	Mandai Crematorium & Columbarium	05:59	00:23	06:28	00:23	06:26	00:23
57051 Aft Sembawang Air Base Sembawang Rd		06:03	00:26	06:30	00:25	06:28	00:25
57061 Dieppe Barracks Sembawang Rd		06:04	00:27	06:31	00:26	06:29	00:26
57071 Opp Khatib Camp Sembawang Rd		06:05	00:28	06:32	00:27	06:30	00:27
57081 Opp Blk 713 Sembawang Rd		06:06	00:29	06:34	00:28	06:32	00:29
59119 Opp Blk 701A Yishun Ave 5	Chong Pang City	06:08	00:31	06:36	00:30	06:34	00:31
59149 Blk 145 Yishun Ave 5		06:10	00:33	06:39	00:32	06:36	00:33
59009 Yishun Int(Alighting) Yishun Ave 2	NS13 Yishun Northpoint City Nee Soon Central CC	06:13	00:36	06:42	00:34	06:39	00:36

Notes:

• 06:00: Underlined times indicate that the first bus is a downroute bus rather than one starting from the first stop.

Historical Information

Operator	Route	Year	Date	Service changes
United Bus Company	Sembawang Ter ↔ Queen St	1971	11 April	Introduced between Sembawang Ter and Queen St Ter under 1971 Bus Reorganisation.
		1973	25 June	Amended to ply Mandai Lake Rd in both directions until 2200 hours daily.
			1 July	Operations transferred to Singapore Bus Services.
		1979	28 October	Amended to ply Sungei Rd, Ophir Rd and Ban San St (towards Queen St Ter) and amended to ply Rochor Canal Rd and Bt Timah Rd, skipping Bencoolen St, Middle Rd, Selegie Rd and Mackenzie Rd (towards Sembawang Ter) with the conversion of Rochor Canal Rd and Rochor Rd to one-way traffic.
			30 December	Amended to ply Jln Anak Bt towards Queen St Ter with the partial conversion of Upp Bt Timah Rd to one-way traffic.
		1984	15 April	Amended to ply Scotts Rd, Orchard Rd and Victoria St/Nth Bridge Rd, skipping Bt Timah Rd and Sungei Rd/Rochor Canal Rd.
		1985	13 October	Amended to the relocated Queen St Ter along Ban San St, skipping Arab St.
	Yishun ↔ Queen St	1987	18 January	Amended to Yishun Ctrl Ter.
			23 August	Amended to Yishun Int.
			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.
		1992	19 July	Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
	Yishun ↔ Marina Ctr	1993	3 January	Extended to Marina Ctr Ter and amended to ply Bt Panjang Rd, Pending Rd and Cashew Rd under TransitLink Network Integration Exercise Phase 11.
		1994	26 April	Amended to skip Mandai Lake Rd and amended to ply Mandai Ave with the introduction of Service 138.
		1995	7 May	Amended to ply Orchard Turn.
Known as prior to 10 May 2004			5 November	Operations transferred to Trans Island Bus Services.
				First bus from Yishun Int revised to 0530 hrs daily.
		1999	26 December	Amended to ply BKE, Bt Panjang Rd, Petir Rd, Jelebu Rd under Bukit Panjang LRT Rationalisation, skipping Woodlands Rd and Cashew Rd.
		2000	TBC	Serves new bus stop before Goldhill Ave along Dunearn Rd.
			TBC	Serves additional bus stop opposite Sembawang Air Base along Sembawang Rd.
		2002	TBC	Serves the bus stop outside Blk 923 along Yishun Ave 2, skipping the bus stop outside Northpoint Shop Ctr.
			7 July	Skips the bus stop outside Orchard Emerald along Orchard Rd.
		2003	TBC	Serves the bus stop outside Northpoint Shop Ctr along Yishun Ave 2, skipping the bus stop outside Blk 923.
		2005	2 July	Amended to ply Grange Rd and Orchard Lk with the partial closure of Somerset Rd.
		2006	29 October	Serves relocated bus stop outside Orchard Stn along Orchard Turn.
		2009	1 June	Designated wheelchair-accessible bus service (WAB).
			21 June	Serves new pair of bus stops outside and opposite Mandai Crematorium & Columbarium along Mandai Ave.
		2010	23 May	Skips temporarily closed bus stop outside Assumption Voc Inst along Upp Bt Timah Rd to facilitate the construction of DT2 Cashew station along the Downtown Line.
		2011	4 September	Serves new bus stop outside Botanic Gdns Stn along Bt Timah Rd.
		2015	1 March	Serves reinstated bus stop outside Assumption Pathway Sch along Upp Bt Timah Rd.
			14 March	Amended to Yishun Temp Int.
			27 December	Serves new bus stop outside Blk 184 along Bt Panjang Rd, skipping the bus stop outside Blk 183.
		2017	4 September	Skips a pair of bus stops outside and opposite Bt Panjang Plaza along Jelebu Rd.
		2018	25 February	Serves additional pair of bus stops outside and opposite Blk 180 along Jelebu Rd.
		2019	8 September	Amended to Yishun Integrated Transport Hub.
	Yishun ↺ Upper Bukit Timah Rd	2020	30 August	Shortened to loop at Upp Bt Timah Rd from Yishun Int under Downtown Line 2 Rationalisation.
(Current)		2021	5 September	Operations transferred to Tower Transit Singapore.

External Links

• Service Information (Tower Transit)
• SimplyGo eGuide
• Bus Service Route Map