SBS Transit Bus Service 122

SBS Transit Bus Service 122 is a residential trunk route running between Kampong Bahru Bus Terminal and Commonwealth Drive, passing through Tiong Bahru, Alexandra Road, Kay Siang Road, Margaret Drive and Commonwealth MRT Station.

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Kampong Bahru Ter ↺ C'wealth Dr (Loop)
10499 Kampong Bahru Ter Spooner Rd
10017 Aft Hosp Dr EW16NE3 Eu Tong Sen St
06011 Opp Outram Park Stn EW16NE3 Outram Rd
06051 Blk 55 Tiong Bahru Rd
10141 Blk 18 Tiong Bahru Rd
10151 Ctrl Green Condo Tiong Bahru Rd
10161 Opp Tiong Bahru Stn EW17 Tiong Bahru Rd
10381 Opp Blk 48 Lower Delta Rd
10241 Gan Eng Seng Sec Sch Alexandra Rd
10261 Delta Sports Hall Alexandra Rd
10271 Opp Tanglin View Alexandra Rd
10321 Aft Margaret Dr Tanglin Rd
10479 Aft Tanglin Rd Kay Siang Rd
10469 Bef Margaret Dr Kay Siang Rd
11499 Queenstown Pr Sch Margaret Dr
11489 Opp Queenstown Lib Margaret Dr
11479 The Fisherman Ch Margaret Dr
11469 Queensway Sec Sch Margaret Dr
11061 Opp Queensway Sec Sch Queensway
11439 Blk 92 C'wealth Dr
11429 Opp Blk 115B C'wealth Dr
11169 Commonwealth Stn Exit B/C EW20 C'wealth Ave
11471 Opp The Fisherman Ch Margaret Dr
11481 Queenstown Lib Margaret Dr
11491 Opp Queenstown Pr Sch Margaret Dr
10461 Aft Margaret Dr Kay Siang Rd
10471 Bef Tanglin Rd Kay Siang Rd
10329 Crescent Girls' Sch Tanglin Rd
10279 Tanglin View Alexandra Rd
10269 Opp Delta Sports Hall Alexandra Rd
10249 Opp Gan Eng Seng Sec Sch Alexandra Rd
10389 Blk 48 Lower Delta Rd
10169 Tiong Bahru Stn EW17 Tiong Bahru Rd
10149 Blk 1 Tiong Bahru Rd
06049 Bef Outram Flyover Outram Rd
06029 Outram Park Stn EW16NE3 Outram Rd
10011 BEF NEIL RD New Bridge Rd
10499 Kampong Bahru Ter Spooner Rd


Technical Information
Route  Kampong Bahru Bus Terminal ↺ Commonwealth Drive (Loop)
Passes Through Tiong Bahru, Alexandra Rd, Kay Siang Rd, Margaret Dr, Commonwealth MRT
Route Length 16.6 km
Travelling Time 70 mins
Operator Information
BCM Route Package Bukit Merah Bus Package
Current Operator SBS Transit Ltd
Current Depot Ulu Pandan Bus Depot (UPDEP)
Current Fleet 12-metre Single Deck Bus:
– Mercedes-Benz Citaro
Scania K230UB
Departure Times from Kampong Bahru
0555hrs  2330hrs (Daily)
Frequency Loop Service
0630hrs – 0830hrs: 11 – 13 mins
0831hrs – 1659hrs: 12 – 16 mins
1700hrs – 1900hrs: 13 – 17 mins
After 1900hrs: 13 – 17 mins


Service 122 provides residents of Tiong Bahru, Alexandra, and Commonwealth Drive with greater connectivity to Outram Park, Tiong Bahru and Commonwealth MRT Stations, along with other amenities in the vicinity. It is the thirty-eighth (38th) bus service to be introduced under the Bus Service Enhancement Programme (BSEP), and the third new BSEP service originating from New Bridge Road after Service 121.

The inter-town service improves on existing bus connections in certain areas, notably Commonwealth Drive (previously only served by Service 195), and Margaret Drive (previously only served by Service 32), linking residential estates and amenities with transport nodes and enhancing connectivity to these areas. Apart from benefiting new residential developments near Dawson Road, such as the new HDB Skyville@Dawson and SkyTerrace developments, the route will serve schools – Gan Eng Seng, Manasseh Meyer, Queenstown Primary, Queensway Secondary, Assumption English, Crescent Girls and Alexandra Primary – as well as amenities such as Tiong Bahru Plaza and Singapore General Hospital.

The service also calls at a new pair of bus stops along Kay Siang Road, which had bus stop provisions constructed years ago but did not receive any bus services until now.

In March 2018, Service 122 was amended to serve Kampong Bahru Bus Terminal following the closure of New Bridge Road Bus Terminal.

MRT Stations Served
Special Departures
  • Commonwealth Drive (Blk 92)  Kampong Bahru Ter
    Weekdays: 0600hrs, 0614hrs
    Saturdays: 0600hrs, 0613hrs
    Sundays / Public Holidays: 0600hrs, 0611hrs

Fare: Charges basic distance fares. See Bus Fares.


Operator History
  • 2015 – Present: SBS Transit Ltd

The Bus Service Operating License (BSOL) for this route will be renewed in 2023 under the Bukit Merah Bus Package.


  • 2015 (15 Mar): Introduced under the LTA’s Bus Service Enhancement Programme (BSEP), plying between New Bridge Road Terminal and Commonwealth Drive (Loop).
  • 2015 (22 Jun): Designated wheelchair-accessible bus route (WAB)
  • 2018 (10 Mar): Amended to Kampong Bahru Ter. First bus departure timings from Kampong Bahru brought forward by 5 minutes.
  • 2018 (18 Nov): Start of operations under Bukit Merah Bus Package (Tendered Contract)

Past Routings:


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