SBS Transit Bus Service 91

SBS Transit Bus Service 91 is a trunk route from Buona Vista and and looping at Ayer Rajah Crescent, passing through Holland Drive and North Buona Vista Road. It has two looping points, one of which is inside the compound of Ayer Rajah Bus Park.

SBST Volvo Olympian 3-axle (SBS9396A) - Service 91

SBST Volvo Olympian 3-axle (SBS9396A) – Service 91

Route Information
Route Buona Vista Bus Terminal ↺ Ayer Rajah Crescent (Loop)  WAB_logo_20px
Passes Through Holland Drive, North Buona Vista Road
Route Length 6.8km
Travelling Time 35mins
Operator Information
Current Operator SBS Transit
Current Depot Ayer Rajah Bus Park (ARBP)
Current Fleet 12-metre Single Deck Bus
Mercedes-Benz O530 Citaro
– Volvo B10M Mark IV
Additional double-deck buses during peak hours
Departure Times from T1 0630 – 2000 (Weekdays)
0630 – 1800 (Saturday)
No operation on Sundays & Public Holidays
Frequency Loop Service
0630-0830: 08 – 15 mins
0831-1659: 08 – 28 mins
1700-1930: 10 – 12 mins
After 1930: 10 – 12 mins

Route History

Service 91 serves the Ayer Rajah Industrial Estate with  bus connections to One-North and Buona Vista MRT stations. Formerly operating with many double-deck buses and a shortworking trip in the morning (91A), the opening of the Circle Line (Stage 4) has relieved much of the heavy peak hour demand on this route, and it now operates on a mostly single-deck fleet at low frequencies.

This service has a unique portion of route which enters the compound of Ayer Rajah Bus Park to turn around at at Ayer Rajah Cres.

During morning peak hours, buses cross over to this service from Service 74 to supplement demand. This service does not operate on Sundays and Public Holidays.

Fare: Charges fares for regular trunk services. See Bus Fares for exact fares.

Fleet: Service 91 has a fleet of Volvo B10M MkIVs and Mercedes-Benz Citaros. Additional double-deck buses from Service 74 perform cross-over trips to this service during peak hours.

Route Information:

Loop Service
  • Buona Vista Ter
  • Holland Dr
  • Commonwealth Ave
  • North Buona Vista Rd
  • Ayer Rajah Ave
  • Ayer Rajah Cres (Loop)
  • Ayer Rajah Ave
  • North Buona Vista Rd
  • Commonwealth Ave
  • Holland Dr
  • Buona Vista Ter
Service 91 at a glance. Click for larger image.

Service 91 at a glance. Click for larger image.

Operator History:

  • 1995 – 2001: Singapore Bus Services Ltd
  • 2001 – Present: SBS Transit Ltd

The Bus Service Operating License (BSOL) for this route will be renewed in 2016. 



  • 1995: Introduced between Buona Vista and Ayer Rajah Cres (Loop), operating on Weekdays and Saturdays (Day service). Saturdays last bus departure time shortened to 6pm.
  • 2012 (09 Apr): No longer calling at the bus stop along Ayer Rajah Crescent, in front of the basement foodcourt (bus stop 18039) as it will be demolished.
  • 2014 (03 Dec): Designated wheelchair-accessible bus route (WAB)

Past Routings:


External Links & References:

Back to Bus Services
Back to Bus Articles

2 thoughts on “SBS Transit Bus Service 91

  1. Hi I heard that you are related to sbs or sort. So can u please ask whether one of these bus companies will operate a new route which terminates at one north mrt station or buona vista terminal a day can this new bus service serve these bus stops so that students do not need to just crowd on 196 and 74 which has low frequency? The bus stops are ACSI BUS STOP, OR ACSI BUS STOP and ONE NORTH MRS BUS STOP as well FAIRFEILD BUS STOP AND OPP FAIRFEILD BUS STOP so we have two mrt stations to go too for students? Thx

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