View source for Bus Service 171

{{Travel Advisory|S171=showonly|SembawangYishunBCM=showonly}}
{{Infobox
 |title=Service 171
 |img=
 |info=
  {{Infohead|Route Information}}
  {{Infoline|Route|Yishun Interchange ↺ Upper Bukit Timah Road (Loop)}}
  {{Infoline|Route Length|31.3 km}}
  {{Infoline|Travelling Time|75 - 93 mins<br><small>(1 h 15 mins - 1 h 33 mins)</small>}}
  {{Infoline|Operator|{{TTS}}<br>([[Sembawang – Yishun Bus Package]])}}
}}

'''Bus Service 171''' is an inter-town route serving the residential areas of [[Yishun]] and [[Bukit Panjang]] via [[Mandai|Mandai Road]] and the [[Bukit Timah Expressway]] (BKE). It is the fastest and most direct route between the two towns, outperforming the MRT in terms of travelling time.

==Service Information==
===Bus Duty & Fleet===
{| class='wikitable' style='text-align:center;'
|+ Service 171
!rowspan=2 style='{{CSS/TTS|xfc=|xbc=}}'|Depot
!colspan=2 style='{{CSS/TTS|xfc=|xbc=}}'|Fleet
|-
!Single Deckers!!Double Deckers
|-
!style='{{CSS/TTS|bgop=c0|xfc=|xbc=}}'|Mandai Depot (MDDEP)
|Mercedes-Benz OC500LE
|Alexander Dennis Enviro500<br>MAN ND323F
|}

{|class="wikitable mw-collapsible mw-collapsed"
!Notes
|-
|
* This service practises jumpbus.
|}

===Route Information===
====Frequency====
{| class='wikitable' style='text-align:center;'
!style='{{CSS/TTS|xfc=|xbc=}}'|Period
!style='{{CSS/TTS|xfc=|xbc=}}'|AM Peak<br><small>(First Bus - 08:30)</small>
!style='{{CSS/TTS|xfc=|xbc=}}'|AM Off Peak<br><small>(08:31 - 16:59)</small>
!style='{{CSS/TTS|xfc=|xbc=}}'|PM Peak<br><small>(17:00 - 19:00)</small>
!style='{{CSS/TTS|xfc=|xbc=}}'|PM Off Peak<br><small>(19:01 - Last Bus)</small>
|-
!Loop Service
|colspan=3|09 - 12 minutes
|12 - 13 minutes
|}

====Special Departures====
* {{BS44731}} ↺ {{BS44029}} → {{BS59009}}
** '''Weekdays:''' 05:35, 05:42, 05:49 & 05:56

====Loop Service====
<div class="mw-collapsible">
<p class='exc'>[Show/Hide Full Route Details]</p>
{| class="wikitable"
!rowspan=2 style='{{CSS/BUS|xfc=|xbc=}}'|Bus Stops
!rowspan=2 style='{{CSS/BUS|xfc=|xbc=}}'|Nearby Attraction
!colspan=2 style='{{CSS/BUS|xfc=|xbc=}}'|Weekdays
!colspan=2 style='{{CSS/BUS|xfc=|xbc=}}'|Saturdays
!colspan=2 style='{{CSS/BUS|xfc=|xbc=}}'|Suns / PHs
|-
!style='{{CSS/LTA|xfc=|xbc=}}'|First bus!!style='{{CSS/LTA|xfc=|xbc=}}'|Last bus
!style='{{CSS/LTA|xfc=|xbc=}}'|First bus!!style='{{CSS/LTA|xfc=|xbc=}}'|Last bus
!style='{{CSS/LTA|xfc=|xbc=}}'|First bus!!style='{{CSS/LTA|xfc=|xbc=}}'|Last bus
|-
|{{BS59009|int=(Berth B3)}}
|{{NS13|}}<br>Northpoint City<br>Nee Soon Central CC
|style='text-align:center'|05:30||style='text-align:center'|23:30||style='text-align:center'|05:30||style='text-align:center'|23:30||style='text-align:center'|05:30||style='text-align:center'|23:30
|- class='ex'
|{{BS59141}}
|
|style='text-align:center'|05:33||style='text-align:center'|23:33||style='text-align:center'|05:33||style='text-align:center'|23:33||style='text-align:center'|05:33||style='text-align:center'|23:33
|- class='ex'
|{{BS59111}}
|Chong Pang CC<br>Chong Pang Market & Food Centre
|style='text-align:center'|05:35||style='text-align:center'|23:35||style='text-align:center'|05:35||style='text-align:center'|23:35||style='text-align:center'|05:35||style='text-align:center'|23:35
|- class='ex'
|{{BS57089}}
|
|style='text-align:center'|05:36||style='text-align:center'|23:36||style='text-align:center'|05:37||style='text-align:center'|23:37||style='text-align:center'|05:37||style='text-align:center'|23:37
|- class='ex'
|{{BS57079}}
|
|style='text-align:center'|05:38||style='text-align:center'|23:38||style='text-align:center'|05:38||style='text-align:center'|23:38||style='text-align:center'|05:38||style='text-align:center'|23:38
|- class='ex'
|{{BS57069}}
|
|style='text-align:center'|05:39||style='text-align:center'|23:39||style='text-align:center'|05:39||style='text-align:center'|23:39||style='text-align:center'|05:39||style='text-align:center'|23:39
|- class='ex'
|{{BS57059}}
|
|style='text-align:center'|05:40||style='text-align:center'|23:40||style='text-align:center'|05:40||style='text-align:center'|23:40||style='text-align:center'|05:40||style='text-align:center'|23:40
|- class='ex'
|{{BS48149}}
|Mandai Crematorium & Columbarium
|style='text-align:center'|05:43||style='text-align:center'|23:43||style='text-align:center'|05:43||style='text-align:center'|23:43||style='text-align:center'|05:43||style='text-align:center'|23:43
|- class='ex'
|{{BS48069}}
|
|style='text-align:center'|05:44||style='text-align:center'|23:44||style='text-align:center'|05:44||style='text-align:center'|23:44||style='text-align:center'|05:44||style='text-align:center'|23:44
|- class='ex'
|{{BS48059}}
|
|style='text-align:center'|05:45||style='text-align:center'|23:45||style='text-align:center'|05:45||style='text-align:center'|23:44||style='text-align:center'|05:45||style='text-align:center'|23:45
|- class='ex'
|{{BS48049}}
|
|style='text-align:center'|05:46||style='text-align:center'|23:46||style='text-align:center'|05:46||style='text-align:center'|23:45||style='text-align:center'|05:46||style='text-align:center'|23:46
|- class='ex'
|{{BS48039}}
|
|style='text-align:center'|05:46||style='text-align:center'|23:46||style='text-align:center'|05:47||style='text-align:center'|23:46||style='text-align:center'|05:47||style='text-align:center'|23:47
|- class='ex'
|{{BS48029}}
|
|style='text-align:center'|05:47||style='text-align:center'|23:47||style='text-align:center'|05:48||style='text-align:center'|23:46||style='text-align:center'|05:48||style='text-align:center'|23:48
|- class='ex'
|{{BS48019}}
|
|style='text-align:center'|05:48||style='text-align:center'|23:48||style='text-align:center'|05:49||style='text-align:center'|23:47||style='text-align:center'|05:49||style='text-align:center'|23:49
|- class='ex'
|{{BS44269}}
|
|style='text-align:center'|05:56||style='text-align:center'|23:54||style='text-align:center'|05:56||style='text-align:center'|23:54||style='text-align:center'|05:55||style='text-align:center'|23:55
|-
|{{BS44229}}
|{{BP8|}}<br>Bukit Panjang CC
|style='text-align:center'|05:57||style='text-align:center'|23:55||style='text-align:center'|05:58||style='text-align:center'|23:55||style='text-align:center'|05:57||style='text-align:center'|23:56
|- class='ex'
|{{BS44219}}
|
|style='text-align:center'|05:59||style='text-align:center'|23:57||style='text-align:center'|06:00||style='text-align:center'|23:57||style='text-align:center'|05:59||style='text-align:center'|23:58
|-
|{{BS44209}}
|{{BP7|}}
|style='text-align:center'|06:00||style='text-align:center'|23:58||style='text-align:center'|06:01||style='text-align:center'|23:58||style='text-align:center'|06:00||style='text-align:center'|23:59
|-
|{{BS44731}}
|{{DT1|}}<br>Hillion Mall<br>Bukit Panjang Plaza
|style='text-align:center'|'''05:35'''||style='text-align:center'|00:00||style='text-align:center'|06:03||style='text-align:center'|00:00||style='text-align:center'|06:02||style='text-align:center'|00:01
|- class='ex'
|{{BS44909}}
|
|style='text-align:center'|05:37||style='text-align:center'|00:02||style='text-align:center'|06:05||style='text-align:center'|00:02||style='text-align:center'|06:04||style='text-align:center'|00:03
|-
|{{BS44029}}
|{{DT1|}}<br>Hillion Mall
|style='text-align:center'|05:38||style='text-align:center'|00:03||style='text-align:center'|06:06||style='text-align:center'|00:03||style='text-align:center'|06:05||style='text-align:center'|00:04
|-
|{{BS44201}}
|{{BP7|}}
|style='text-align:center'|05:41||style='text-align:center'|00:06||style='text-align:center'|06:09||style='text-align:center'|00:06||style='text-align:center'|06:08||style='text-align:center'|00:06
|- class='ex'
|{{BS44211}}
|
|style='text-align:center'|05:42||style='text-align:center'|00:07||style='text-align:center'|06:10||style='text-align:center'|00:07||style='text-align:center'|06:09||style='text-align:center'|00:07
|-
|{{BS44221}}
|{{BP8|}}<br>Bukit Panjang CC
|style='text-align:center'|05:44||style='text-align:center'|00:09||style='text-align:center'|06:12||style='text-align:center'|00:08||style='text-align:center'|06:11||style='text-align:center'|00:09
|- class='ex'
|{{BS44261}}
|
|style='text-align:center'|05:47||style='text-align:center'|00:11||style='text-align:center'|06:14||style='text-align:center'|00:10||style='text-align:center'|06:13||style='text-align:center'|00:11
|- class='ex'
|{{BS48011}}
|
|style='text-align:center'|05:54||style='text-align:center'|00:17||style='text-align:center'|06:21||style='text-align:center'|00:17||style='text-align:center'|06:19||style='text-align:center'|00:17
|- class='ex'
|{{BS48021}}
|
|style='text-align:center'|05:55||style='text-align:center'|00:18||style='text-align:center'|06:22||style='text-align:center'|00:18||style='text-align:center'|06:20||style='text-align:center'|00:18
|- class='ex'
|{{BS48031}}
|
|style='text-align:center'|05:56||style='text-align:center'|00:19||style='text-align:center'|06:23||style='text-align:center'|00:19||style='text-align:center'|06:21||style='text-align:center'|00:19
|- class='ex'
|{{BS48041}}
|
|style='text-align:center'|05:56||style='text-align:center'|00:19||style='text-align:center'|06:24||style='text-align:center'|00:20||style='text-align:center'|06:22||style='text-align:center'|00:20
|- class='ex'
|{{BS48051}}
|
|style='text-align:center'|05:57||style='text-align:center'|00:20||style='text-align:center'|06:25||style='text-align:center'|00:21||style='text-align:center'|06:23||style='text-align:center'|00:21
|- class='ex'
|{{BS48061}}
|
|style='text-align:center'|05:58||style='text-align:center'|00:22||style='text-align:center'|06:26||style='text-align:center'|00:22||style='text-align:center'|06:24||style='text-align:center'|00:22
|- class='ex'
|{{BS48141}}
|Mandai Crematorium & Columbarium
|style='text-align:center'|05:59||style='text-align:center'|00:23||style='text-align:center'|06:28||style='text-align:center'|00:23||style='text-align:center'|06:26||style='text-align:center'|00:23
|- class='ex'
|{{BS57051}}
|
|style='text-align:center'|06:03||style='text-align:center'|00:26||style='text-align:center'|06:30||style='text-align:center'|00:25||style='text-align:center'|06:28||style='text-align:center'|00:25
|- class='ex'
|{{BS57061}}
|
|style='text-align:center'|06:04||style='text-align:center'|00:27||style='text-align:center'|06:31||style='text-align:center'|00:26||style='text-align:center'|06:29||style='text-align:center'|00:26
|- class='ex'
|{{BS57071}}
|
|style='text-align:center'|06:05||style='text-align:center'|00:28||style='text-align:center'|06:32||style='text-align:center'|00:27||style='text-align:center'|06:30||style='text-align:center'|00:27
|- class='ex'
|{{BS57081}}
|
|style='text-align:center'|06:06||style='text-align:center'|00:29||style='text-align:center'|06:34||style='text-align:center'|00:28||style='text-align:center'|06:32||style='text-align:center'|00:29
|- class='ex'
|{{BS59119}}
|Chong Pang CC<br>Chong Pang Market & Food Centre
|style='text-align:center'|06:08||style='text-align:center'|00:31||style='text-align:center'|06:36||style='text-align:center'|00:30||style='text-align:center'|06:34||style='text-align:center'|00:31
|- class='ex'
|{{BS59149}}
|
|style='text-align:center'|06:10||style='text-align:center'|00:33||style='text-align:center'|06:39||style='text-align:center'|00:32||style='text-align:center'|06:36||style='text-align:center'|00:33
|-
|{{BS59009|int=(Alighting)}}
|{{NS13|}}<br>Northpoint City<br>Nee Soon Central CC
|style='text-align:center'|06:13||style='text-align:center'|00:36||style='text-align:center'|06:42||style='text-align:center'|00:34||style='text-align:center'|06:39||style='text-align:center'|00:36
|}
</div>

==Historical Information==
{| class="wikitable" style='text-align:center'
!style={{CSS/BUS|xfc=|xbc=}}|Operator
!style={{CSS/BUS|xfc=|xbc=}}|Route
!style={{CSS/BUS|xfc=|xbc=}}|Year
!style={{CSS/BUS|xfc=|xbc=}}|Date
!style={{CSS/BUS|xfc=|xbc=}}|Service changes
|-
|rowspan=2|UBC
|rowspan=6|Sembawang Ter ↔ Queen St
|'''1971'''
|'''11 April'''
|style='text-align:left'|Introduced between Sembawang Ter and Queen St Ter under 1971 Bus Reorganisation.
|-
|'''1973'''
|'''25 June'''
|style='text-align:left'|Amended to ply Mandai Lake Rd in both directions until 2200 hours daily.
|-
|rowspan=12|{{SBS}}
|rowspan=2|'''1979'''
|'''28 October'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to the relocated Queen St Ter along Ban San St, skipping Arab St.
|-
|rowspan=5|Yishun ↔ Queen St
|rowspan=4|'''1987'''
|'''18 January'''
|style='text-align:left'|Amended to Yishun Ctrl Ter.
|-
|'''23 August'''
|style='text-align:left'|Amended to Yishun Int.
|-
|rowspan=2|'''13 December'''
|style='text-align:left'|Serves new staggered bus stop outside Orchard Stn along Orchard Blvd, skipping the bus stop opposite Orchard Stn.
|-
|style='text-align:left'|Serves new bus stop outside Newton Stn along Scotts Rd.
|-
|'''1992'''
|'''19 July'''
|style='text-align:left'|Amended to ply Orchard Lk due to the closure of Grange Rd to facilitate road expansion works.
|-
|rowspan=23|Yishun ↔ Marina Ctr
|'''1993'''
|'''3 January'''
|style='text-align:left'|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'''
|style='text-align:left'|Amended to skip Mandai Lake Rd and amended to ply Mandai Ave with the introduction of Service 138.
|-
|rowspan=3|'''1995'''
|'''7 May'''
|style='text-align:left'|Amended to ply Orchard Turn.
|-
|rowspan=21|{{SMB}}<br>''Known as {{TIBS}} prior to 10 May 2004''
|rowspan=2|'''5 November'''
|style='text-align:left'|Operations transferred to Trans Island Bus Services.
|-
|style='text-align:left'|First bus from Yishun Int revised to 0530 hrs daily.
|-
|'''1999'''
|'''26 December'''
|style='text-align:left'|Amended to ply BKE, Bt Panjang Rd, Petir Rd, Jelebu Rd under {{BPLRT}} Rationalisation, skipping Woodlands Rd and Cashew Rd.
|-
|rowspan=2|'''2000'''
|{{TBC}}
|style='text-align:left'|Serves new bus stop before Goldhill Ave along Dunearn Rd.
|-
|{{TBC}}
|style='text-align:left'|Serves additional bus stop opposite Sembawang Air Base along Sembawang Rd.
|-
|rowspan=2|'''2002'''
|{{TBC}}
|style='text-align:left'|Serves the bus stop outside Blk 923 along Yishun Ave 2, skipping the bus stop outside Northpoint Shop Ctr.
|-
|'''7 July'''
|style='text-align:left'|Skips the bus stop outside Orchard Emerald along Orchard Rd.
|-
|'''2003'''
|{{TBC}}
|style='text-align:left'|Serves the bus stop outside Northpoint Shop Ctr along Yishun Ave 2, skipping the bus stop outside Blk 923.
|-
|'''2005'''
|'''2 July'''
|style='text-align:left'|Amended to ply Grange Rd and Orchard Lk with the partial closure of Somerset Rd.
|-
|'''2006'''
|'''29 October'''
|style='text-align:left'|Serves relocated bus stop outside Orchard Stn along Orchard Turn.
|-
|rowspan=2|'''2009'''
|'''1 June'''
|style='text-align:left'|{{DWAB}}
|-
|'''21 June'''
|style='text-align:left'|Serves new pair of bus stops outside and opposite Mandai Crematorium & Columbarium along Mandai Ave.
|-
|'''2010'''
|'''23 May'''
|style='text-align:left'|Skips temporarily closed bus stop outside Assumption Voc Inst along Upp Bt Timah Rd to facilitate the construction of {{DT2|}} station along the {{DTL}}.
|-
|'''2011'''
|'''4 September'''
|style='text-align:left'|Serves new bus stop outside Botanic Gdns Stn along Bt Timah Rd.
|-
|rowspan=3|'''2015'''
|'''1 March'''
|style='text-align:left'|Serves reinstated bus stop outside Assumption Pathway Sch along Upp Bt Timah Rd.
|-
|'''14 March'''
|style='text-align:left'|Amended to Yishun Temp Int.
|-
|'''27 December'''
|style='text-align:left'|Serves new bus stop outside Blk 184 along Bt Panjang Rd, skipping the bus stop outside Blk 183.
|-
|'''2017'''
|'''4 September'''
|style='text-align:left'|Skips a pair of bus stops outside and opposite Bt Panjang Plaza along Jelebu Rd.
|-
|'''2018'''
|'''25 February'''
|style='text-align:left'|Serves additional pair of bus stops outside and opposite Blk 180 along Jelebu Rd.
|-
|'''2019'''
|'''8 September'''
|style='text-align:left'|Amended to Yishun Integrated Transport Hub.
|-
|rowspan=2|Yishun ↺ Upper Bukit Timah Rd
|'''2020'''
|'''30 August'''
|style='text-align:left'|Shortened to loop at Upp Bt Timah Rd from Yishun Int under {{DTL}} 2 Rationalisation.
|-
|{{TTS}}<br>'''(Current)'''
|'''2021'''
|'''5 September'''
|style='text-align:left'|Operations transferred to Tower Transit Singapore.
|}

==External Links==
* [https://www.towertransit.sg/route/171 Bus Service Information for Service 171 (Tower Transit)]
* [https://svc.simplygo.com.sg/eservice/eguide/service_route.php?service=171 Bus Service Information for Service 171 (SimplyGo eGuide)]
* [https://busrouter.sg/#/services/171 Bus Service Route Map for Service 171]

{{Sembawang – Yishun Bus Package}}