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.

Bus Service 91: Buona Vista ↺ Ayer Rajah Crescent (Loop)
From Buona Vista Looping at Ayer Rajah Crescent
  • Nth Buona Vista Rd
    – Buona Vista Ter
  • Holland Dr
    – Blk 10A
  • C’Wealth Ave
    – Opp Blk 43
  • Nth Buona Vista Rd
    – Buona Vista Stn Exit D
    – Opp Anglo-Chinese JC
  • Ayer Rajah Ave
    – one-north Stn
  • Ayer Rajah Cres
    – Opp GEMPLUS
    – Tempco Mfg
    – Opp Blk 71
    – S’pore Post
  • Ayer Rajah Cres
    – Ayer Rajah Bus Pk
    – Blk 55
    – Blk 71
  • Ayer Rajah Ave
    – Opp one-north Stn
  • Nth Buona Vista Rd
    – Aft Anglo-Chinese JC
    – Buona Vista Stn Exit C
  • C’Wealth Ave
    – Blk 43
  • Holland Dr
    – Blk 46
  • Nth Buona Vista Rd
    – Buona Vista Ter


  • 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 Ayer Rajah Bus Park (ARBP)
Current Fleet 12-metre Single Deck Bus:
Mercedes-Benz O530 Citaro
Volvo B10M Mark IV
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.

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 basic distance fares. See Bus Fares. Calculate your bus fare using LTA’s fare calculator on here.

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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