SBS Transit Bus Service 123M

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SBS Transit Bus Service 123M is a residential trunk route from Harbourfront Bus Interchange and looping at Tiong Bahru Rd, passing through Lower Delta Road. It is route variant of Service 123.

Route Information
Route HarbourFront Bus Interchange ↺ Tiong Bahru Road (Loop) 
Passes Through Lower Delta Road
Route Length 10.5 km
Travelling Time 50 mins (scheduled)
Operator Information
Current Operator SBS Transit
Current Depot Ayer Rajah Bus Park (ARBP)
Current Fleet Mercedes-Benz O530 Citaro
Departure Times from T1 Weekdays & Sat: 5:50am – 12:05am
Sundays & PHs: 6:05am – 12:05am
Frequency Loop Service
0630-0830: 10 – 14 mins
0831-1659: 10 – 18 mins
1700-1930: 12 – 15 mins
After 1930: 14 – 15 mins


  • 2008 (28 Jan): Introduced to replace Shortworking trip 123B. This route was already wheelchair-accessible (WAB) when launched.
  • 2014 (24 Aug): Extended to HarbourFront and looping at Tiong Bahru Road under LTA’s Bus Service Enhancement Programme (BSEP)

Service 123M primarily serves residents along Lower Delta Road and Bukit Purmei Avenue with connections to amenities around Tiong Bahru MRT and HarbourFront MRT/Int. The route operates daily as a supplementary service of Service 123, enhancing bus connections for residents in these areas.

Formerly a weekday evening peak route between Bukit Purmei and Tiong Bahru MRT, the extended route will not only provide better access to commuters heading to Harbourfront MRT station and Tiong Bahru MRT station, but also give convenient access to amenities such as Bukit Purmei Hillock Park, Harbourfront Centre, Radin Mas Primary School and VivoCity.

This service calls at several bus stops in Bukit Purmei estate twice in different directions, i.e. towards Tiong Bahru Road and towards HarbourFront. Red and white service plates are used to distinguish the direction of travel in addition to Electronic Display Signages (EDS) on buses. Red plate indicates buses heading for Tiong Bahru Road; white plate indicates buses heading for HarbourFront.

Route variants:

  • SBS Transit Service 123: Bukit Merah Bus Interchange ↔ HarbourFront Bus Interchange

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

Fleet: Service 123M uses Mercedes-Benz O530 Citaro buses under the BSEP scheme.

Route Information:

Loop Service
  • HarbourFront Int
  • Telok Blangah Rd
  • Kg Bahru Rd
  • Lower Delta Rd
  • Bt Purmei Ave
  • Lower Delta Rd
  • Tiong Bahru Rd
    (Loop via Zion Rd, Seng Poh Rd)
  • Tiong Bahru Rd
  • Lower Delta Rd
  • Bt Purmei Ave
  • Lower Delta Rd
  • Kg Bahru Rd
  • Telok Blangah Rd
  • HarbourFront Int

Operator History:

  • 2008 – Present: SBS Transit Ltd

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


Gallery (Route details):

SBST Launch Press ReleaseBSEP Promotional Hanger for Service 123MGallery (Pre-BSEP):



External Links:

  • TransitLink E-Guide



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