SBS Transit Bus Service 100A

SBS Transit Bus Service 100A is a Short-Trip Service variant of Bus Service 100.

The route operates from Serangoon Bus Interchange and ends at Aljunied Road (Aljunied Stn), operating on Weekdays morning and evening peak hours.

S'Goon Int
→ Aljunied Stn
66009 S'Goon Int B3 NE12CC13 S'goon Ave 2
62129 Blk 403 Upp S'goon Rd
62119 Aft Sunshine Lodge Upp S'goon Rd
61049 Aft Bartley Rd Upp S'goon Rd
61039 Woodleigh Stn Exit A NE11 Upp S'goon Rd
70069 Aft Bidadari Pk Dr Upp Aljunied Rd
70059 Blk 7 Upp Aljunied Rd
70049 Aft Blk 4 Upp Aljunied Rd
70039 Aljunied Pk Aljunied Rd
70029 Canossa Catholic Pr Aljunied Rd
70019 Blk 125 Aljunied Rd
81099 Blk 102 Aljunied Rd
81089 Aljunied Stn EW9 Aljunied Rd
Route Overview
Route WAB_logo_20px Serangoon Bus Interchange → Aljunied Road (Aljunied Stn)
Passes Through Upp Serangoon Rd, Upp Aljunied Rd
Route Length 4.8 km
Travelling Time 22 mins
Operator Information
BCM Route Package Clementi Bus Package
Current Operator SBS Transit Ltd
Current Depot Bukit Batok Bus Depot (BBDEP)
Hougang Bus Depot (HGDEP)
Current Fleet Single-deck buses
Operating Hours
Departure Times from Serangoon
Weekdays, except Public Holidays
06:29 – 08:59 & 17:41 – 19:37
Fare Information
Fare Charges regular distance fares


Short Trip Service 100A is a trunk service operating from Serangoon Bus Interchange and ends at Aljunied Road (Aljunied Stn).

As a Short-Trip Service, the route operates on Weekdays, during both the morning and evening hours, and supplements the high demand for Service 100 from Serangoon and Aljunied Road to Aljunied MRT Station.

MRT Stations Served:
Departure Timings

Weekdays, except Public Holidays

  • From Serangoon Int:
    Morning Peak: 06:29, 07:13, 07:53, 08:08 & 08:59
    Evening Peak: 17:41, 18:06, 18:28, 18:44, 19:00, 19:13 & 19:37


Operator History:
  • 2000 – 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.

Route History:
  • 2000: Introduced from Serangoon Int to Aljunied Rd (Aljunied Stn) during morning peak hours on weekdays
  • 2002: Serves new bus stop after Sunshine Lodge along Upp Serangoon Rd
  • 2011 (03 Sep): Amended to Serangoon Integrated Transport Hub
  • 2017 (12 Mar): Amended to ply Upp Serangoon Rd and the diverted Upp Aljunied Rd

Back to Bus Service 100
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