Tower Transit Bus Service 173A

Tower Transit Bus Service 173A is a Short-Trip Service variant of Bus Service 173.

The route operates from Bukit Batok Bus Interchange and ends at Bukit Batok East Avenue 4 (Blk 254), operating daily, after the last bus of Service 173 has departed.

Route Overview
Route	Bukit Batok Bus Interchange → Bukit Batok East Avenue 4 (Blk 254)
Passes Through	Bt Batok St 21
Route Length	2.9 km
Travelling Time	11 mins
Operator Information
BCM Route Package	Bulim Bus Package
Current Operator	Tower Transit Singapore Pte Ltd (Tower Transit Singapore)
Current Depot	Bulim Bus Depot
Current Fleet	Single Deck Bus – MAN A22 – Mercedes-Benz Citaro
Operating Hours
Departure Times from Bukit Batok	Weekdays & Saturdays								Sundays / Public Holidays
	23:45 – 01:10								23:50 – 01:10
Fare Information
Fare	Charges regular distance fares

Short Trip Service 173A is a trunk service operating from Bukit Batok Bus Interchange and ends at Bukit Batok East Avenue 4 (Blk 254). The Short-Trip Service offers unidirectional trips serving within the Bukit Batok estate during the late night hours (after the last bus of Service 173 has departed), without having to operate full-distance trips of Service 173.

During Eves of Public Holidays, as well as MRT Early Closure affecting Bukit Batok MRT Station, operating hours will be extended. Exact last bus hours are announced by Tower Transit closer to these dates.

Departure Timings:

• From Bukit Batok Interchange:
  Weekdays & Saturdays: 23:45 – 01:10
  Sundays / Public Holidays: 23:50, 00:10, 00:30, 00:50 & 01:10

MRT Station Served:

• NS2 Bukit Batok

Gallery:

Operator History:

• 27 Nov 2011 – 28 May 2016: SMRT Buses Ltd
• 29 May 2016 – Present: Tower Transit Singapore

The Bus Service Operating License (BSOL) for this route will be renewed in 2026 under the Bulim Bus Package.

Route History:

• 2011 (27 Nov): Introduced from Bt Batok Int to Bt Batok East Ave 4 (Blk 254), operating after the last bus of Service 173 daily
• 2012: Last bus timing from Bukit Batok extended to 01:00
• 2016 (29 May): Operations transferred to Tower Transit Singapore Pte Ltd from SMRT Buses Ltd
• 2019 (05 Oct): Last bus timing from Bukit Batok amended from 01:00 to 01:10

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