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, both along Ayer Rajah Crescent.

Buona Vista Ter ↺ Ayer Rajah Cres (Loop)
Buona Vista Ter
Nth Buona Vista Rd
Blk 10A
Holland Dr
Opp Blk 43
C'wealth Ave
Buona Vista Stn Exit D
Nth Buona Vista Rd
Essec Business Sch
Nth Buona Vista Rd
One-North Stn
Ayer Rajah Ave
Ayer Rajah Cres
Tempco Mfg
Ayer Rajah Cres
Opp Blk 71
Ayer Rajah Cres
S'pore Post
Ayer Rajah Cres
Ayer Rajah Bus Pk
Ayer Rajah Cres
Blk 55
Ayer Rajah Cres
Blk 71
Ayer Rajah Cres
Opp One-North Stn
Ayer Rajah Ave
Aft Anglo-Chinese JC
Nth Buona Vista Rd
Buona Vista Stn Exit C
Nth Buona Vista Rd
Blk 43
C'wealth Ave
Blk 46
Holland Dr

  • No Boarding & Alighting at Buona Vista Terminal


Technical Information
Route WAB_logo_20px
Buona Vista Bus Terminal ↺ Ayer Rajah Crescent (Loop)
Passes Through Holland Dr, Ayer Rajah Ave
Route Length 6.8 km
Traveling Time 35 mins
Operator Information
BCM Route Package Clementi Bus Package
Current Operator SBS Transit Ltd
Current Depot Bukit Batok Bus Depot (BBDEP)
Current Fleet 12-metre Single Deck Bus:
Mercedes-Benz O530 Citaro
Departure Times from Buona Vista
0630hrs – 2000hrs (Weekdays, except Public Holidays)
0630hrs – 1800hrs (Saturdays)
No Operation on Sundays & Public Holidays
Frequency Loop Service
0630-0830: 07 – 14 mins
0831-1659: 07 – 19 mins
1700-1900: 10 – 12 mins
After 1900: 10 – 11 mins

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 before its closure in September 2018.

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

Fare: Charges basic distance fares. See Bus Fares.

MRT Stations Served


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 2025 under the Clementi Bus Package.

  • 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

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