Scheme B Bus Routes

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.

Scheme B Bus Services were initially introduced to supplement services back in 1974. 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 newly opened Jurong Bus Interchange in 1978.

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 re-numbered into the 6XX series.

All Scheme B bus services uses low-floor buses, failure to comply with low-floor regulations is an offence, and it is 6XX. LTA had updated some Scheme B bus route plates each year, such as 2008/09, 2011/12 and 2014.

Bus Routes do include: Others do include:
 * 620: Bedok North ↔ Resorts World Sentosa
 * 621: Bedok North Avenue 3 ↔ Shenton Way
 * 639: Woodlands Avenue 7 ↔ HarbourFront
 * 640: Woodlands Bus Park ↔ Shenton Way
 * 642: Dover Road ↔ Nicoll Highway
 * 644: Siglap Link ↔ Central Boulevard
 * 656: Clementi Avenue 3 ↔ Marina Bay Sands
 * 1) 625
 * 2) 628
 * 3) 640
 * 4) 641
 * 5) 642
 * 6) 644
 * 7) 645