Scheme B Bus Services

Scheme B Bus Services (part of Supplementary Bus Services) complement existing basic bus services by providing additional capacity primarily during peak hours. These services are provided by private bus operators, such as private-hire or school bus operators.

These bus services are subject to a different regulatory framework by the Public Transport Council (PTC) as compared to regular basic and basic-plus bus routes operated by major public transport operators SBS Transit and SMRT. Information on these bus services (exact routing, fares and departure times) are not readily published, making them notoriously difficult to find. While these reflect on greater flexibility on the part of private bus operators, these services often go unnoticed by the general public due to low outreach and infrequent departures.


Scheme B Bus Services were initially introduced to supplement existing Singapore Bus Service Ltd (SBS) routes back in the late 1970s. An initial four services (247A, 249A, 250A and 251A) operated as unidirectional peak hour services from Boon Lay Garden Bus Terminal to the Jurong & Tuas Industrial Estates, replacing lost transport links when many existing services were amended to the then-newly opened Jurong Bus Interchange.

Initially operated by SBS, these services were later transferred to private bus operators, making them the very first Scheme B bus routes. Poor demand led to the withdrawal of these Scheme B services. In 1997, all existing Scheme B bus routes were renumbered into the 6XX series.

Scheme B bus services were reflected on the old bus stop poles on white background metal plates. When the bus stop poles were all replaced in 2009 by LTA, the bus services reflected on these poles did not include the Scheme B bus services. They were only reflected in October 2014.

Since there was no readily available and updated information about these bus services, the Land Transport Guru Admin Team appreciates more information about these Services. If you have information about these services, please do contact us by filling the form below. Your contribution is greatly appreciated.

List Of Scheme B Bus Services:

Sv No Destination
621 Bedok Reservoir Rd ↔ Shenton Way
623 Boon Lay Gardens ↔ Jalan Samulun
625 Boon Lay Gardens ↔ Shenton Way
640 Admiralty Rd West ↔ Shenton Way

External Links & References

4 thoughts on “Scheme B Bus Services

  • 10 October 2017 at 5:23 PM

    Is 621 still available ? What is the timing for PM peak ?

    • 7 November 2017 at 7:05 PM

      Im keen to know the timings too. I’ve seen the bus at 7pm at the bus stop in front of One Raffles Quay. Any more info on the other pm peak timings?

    • 10 January 2018 at 7:01 AM

      I use that everyday.
      In evening, last bus from OPP AXA TOWER to BEDOK direction is at 7:37 pm.
      Before that I have used it at 5:50 PM and 6 PM also.
      There are 5 or 6 buses in the evening (between 5 to 7:37).
      In the morning, I am aware of only 2 buses (I board from OPP EASTERN LAGOON which is last stop and go to SHENTON WAY and the timings are 7:58 AM and 8:45 AM from my stop.
      If anyone is aware of more timings to SHENTON WAY, please advice.


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