Tower Transit Bus Service 189

Tower Transit Bus Service 189 is a trunk route running from Bukit Batok Bus Interchange and looping at Clementi Avenue 1, passing through Bukit Batok Avenue 1, Street 23, AYE, Clementi Avenue 6 and Clementi MRT.

Bt Batok Int
↺ Clementi Ave 1 (Loop)
43009 Bt Batok Int B5 NS2 Bt Batok Ctrl
43701 Blk 225 Bt Batok Ctrl
43389 Opp Blk 102 Bt Batok Ave 1
43519 Opp Bt Batok Swim Cplx Bt Batok East Ave 6
43599 Bt View Sec Sch Bt Batok East Ave 6
43509 Blk 291E Bt Batok St 23
43219 Opp Sbst Bt Batok Depot Bt Batok St 23
43319 Opp Midview Bldg Bt Batok St 23
42319 Burgundy Hill Bt Batok East Ave 3
12209 Opp Logishub @ Clementi Clementi Ave 6
17379 Blk 304 Clementi Ave 6
17189 Blk 317 C'wealth Ave West
17179 Clementi Stn Exit B EW23 C'wealth Ave West
17259 Opp Blk 460 Clementi Ave 2
17139 Aft Clementi Ave 2 AYE
17191 NUS High Sch Clementi Rd
16991 Opp Nan Hua High Sch Clementi Ave 1
16891 Opp Blk 420A Clementi Ave 1
17161 Blk 455 C'wealth Ave West
17171 Clementi Stn Exit A EW23 C'wealth Ave West
17181 Opp Blk 317 C'wealth Ave West
17371 Blk 201 Clementi Ave 6
12201 Logishub @ Clementi Clementi Ave 6
42311 Opp Burgundy Hill Bt Batok East Ave 3
43311 Midview Bldg Bt Batok St 23
43211 Sbst Bt Batok Depot Bt Batok St 23
43501 Opp Blk 291E Bt Batok St 23
43591 Opp Bt View Sec Sch Bt Batok East Ave 6
43511 Bt Batok Swim Cplx Bt Batok East Ave 6
43381 Blk 102 Bt Batok Ave 1
43709 Blk 644 Bt Batok Ctrl
43009 Bt Batok Int NS2 Bt Batok Ctrl
Route Overview
Route WAB_logo_20px Bukit Batok Bus Interchange ↺ Clementi Avenue 1 (Loop)
Passes Through Bukit Batok East Ave 6, Bukit Batok St 23, Clementi Ave 6, Commonwealth Ave West
Route Length 16.3 km
Travelling Time 51 – 81 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 & Double-deck buses
Includes electric double deck buses (Yutong E12DD)
Operating Hours
Departure Times from Bukit Batok
05:45 – 23:15
Buses departing Bukit Batok after 23:15 to 01:10 operates as Service 189A and terminates at Bukit Batok St 23 (Opp Midview Bldg)
Operating Frequency
Weekdays 6:30am–8.30am 8.31am–4.59pm 5.00pm–7.00pm After 7.00pm
Loop Service 5 mins 6 mins 6 – 10 mins 15 – 21 mins
Fare Information
Fare Charges regular distance fares


Service 189 is an inter-town route serving between Bukit Batok and looping at Clementi Ave 1, via Bukit Batok Neighbourhood 2, Bukit Batok Street 23, Clementi Avenue 6, Clementi MRT and Clementi Road.

The route is well patronized between the industrial areas around Bukit Batok Street 23 and Bukit Batok MRT, with Short Trip Service 189A performing supplementary trips during Weekdays Morning Peak, and scheduled mid-route departures (“downroutes”) in the reverse direction during Weekdays Evening Peak. The sector between Clementi MRT and Clementi Ave 1 receives moderate demand due to the area’s presently limited residential developments, but encounters high demand from students heading to the educational institutions along Clementi Avenue 1.

In 2014, SMRT Bus Service 189 was involved in a small scale bus loading trial where buses were equipped with electronic displays beside the front door, which indicates when the next bus will arrive and the passenger loading onboard that bus. The trial was never expanded, and LTA subsequently released bus loading information for mobile apps in addition to expected time of arrival.

MRT Stations Served
Special Departures
  • C’Wealth Ave West (Clementi Stn Exit B) → Bukit Batok Int via Clementi Ave 1
    Weekdays: 05:58, 07:05 & 07:13
  • Clementi Rd (NUS High Sch) → Bukit Batok Int
    Weekdays: 13:34, 14:24, 14:42, 14:51 & 15:09
  • Bukit Batok St 23 (Midview Bldg) → Bukit Batok Int
    Weekdays: 17:05, 17:13, 17:21, 17:34, 17:42, 17:50, 18:05, 18:13, 18:21, 18:35, 18:42 & 18:49
Short Trip Service
  • Service 189A: Bukit Batok Int → Bukit Batok St 23 (Opp Midview Bldg)
    Weekdays: 07:01 – 08:59 & 23:30 – 01:10
    Saturdays & Sundays / Public Holidays: 23:30 – 01:10

After 23:15 daily, buses will be renumbered as 189A and terminate at Bukit Batok Street 23, Opp Midview Building.
During Eves of Public Holidays, last bus timings of Service 189A will be extended to complement the extension of train operating hours.

Poster Gallery
Gallery (Tower Transit)
Gallery (SMRT Buses):


Operator History
  • 1974 – 2000: Singapore Bus Services
  • 2000 – 2004: Trans-Island Bus Services
  • 2004 – 28 May 2016: SMRT Buses Ltd
  • 29 May 2016 – Present: Tower Transit Singapore Pte Ltd

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

  • 1974 (03 Feb): Re-numbered from Service 193A as a service between Commonwealth Ave Ter and South Canal Rd Ter under 1974 Bus Rationalisation
  • 1974 (08 Dec): Amended to ply Cecil St, skipping Robinson Rd
  • 1979 (15 Jan): Amended to loop at Empress Pl and amended to ply Commonwealth Ave, Alexandra Rd, Lower Delta Rd, Jln Bt Merah and Kg Bahru Rd
  • 1979 (11 Feb): Amended to ply the extended Shenton Way towards Commonwealth Ave Ter, skipping Parsi Rd and Anson Rd
  • 1980 (20 Jan): Amended to ply Spottiswoode Park Rd with the partial conversion of Cantonment Rd to one-way traffic
  • 1982: Amended to Buona Vista Ter
  • 1985 (24 Nov): Extended to Bt Batok Ter and Marina Ctr Ter
  • 1986 (30 Nov): Amended to the relocated Marina Ctr Ter along Raffles Blvd
  • 1987 (27 Sep): Amended to Bt Batok Int
  • 1987 (01 Nov): Amended to ply Eu Tong Sen St towards Marina Ctr Ter to facilitate the second stage of road expansion along New Bridge Rd
  • 1991 (28 Apr): Shortened to loop at Clementi West St 2, integrated with Service 366 and amended to ply Bt Batok Central, Bt Batok Ave 1, Bt Batok East Ave 6 and Bt Batok St 23 under TransitLink Network Integration Exercise Phase 4
  • 1996 (06 May): Extended to loop at West Coast Ferry Ter, skipping Clementi West St 2
  • 1996: Amended to ply PIE and Clementi Ave 6, skipping Toh Tuck Ave
  • 1999: Serves new pair of bus stops outside and opposite West Bay Resort Condo along West Coast Rd
  • 2000 (18 Jun): Operations transferred to Trans-Island Bus Services (TIBS) 
  • 2001 (15 Apr): Shortened to loop at Kent Ridge Ter
  • 2009 (01 Jun): Designated wheelchair-accessible bus route (WAB)
  • 2014 (23 Nov): Amended to loop at Clementi Ave 1 with the introduction of Service 201, skipping West Coast Rd and Kent Ridge Ter
  • 2016 (29 May): Operations transferred to Tower Transit Singapore Pte Ltd under Bulim Bus Package
  • 2024 (28 Jan): Serves relocated bus stop after Clementi Swim Cplx along AYE

Past Routings

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5 thoughts on “Tower Transit Bus Service 189

  • 30 April 2024 at 10:05 AM

    Terrible waiting time for bus 189. Getting on board become a wishing thinking.

    Waiting at bus stop Number: 43519 (Opposite Bt Batok Swimming Complex)
    Alighting at bus stop number: 43319 (Opposite Midview Building)
    A less than 10 mins journey took more than 30mins to reach.

    Can you imagine you have to worry whether today can board onto the bus or not?
    Can you imagine, waiting endlessly and only manage to board on the 5th incoming bus? and you have squeeze at entrance in order not to miss the bus anymore.
    And is a DAILY affair.

    Given credit, the bus schedule wasn’t that horrible until beginning of this year (2024).

    Hopefully, the service can improve.

  • 22 February 2023 at 10:50 AM

    I am an ordinary, law-abiding 40-year-old office worker. During working hours in the morning, I “often” encounter situations where the 189 bus captain enters the station without turning on the direction signal (bus stop: clementi -opp blk 317), this is basic driving common sense. I often have to stop until the bus finally stops and they willing to open the door, if give passenger have this feeling, that is a serious problem. One week, I waved for two days in a row (100 meters before entering the bus stop, there must be enough time for the driver to see and react), and they pretended didn’t see it and wanted to leave away. It happened that his lane was stopping at a red traffiic light , I stood in front of the bus door and looked at him, then he opened the door reluctantly. I didn’t write down the time and who the driver is, because I was also worried about getting his bus next time or something else. I also hope that you can improve the basic traffic rules for driving, train your employees well, and don’t always treat passengers with an rule attitude, spoil everyone’s good image of Singapore. I hope I can see your reply here. Thank you.

  • 26 March 2022 at 4:01 PM

    106 & 189 can covert into full DD service.The A22 can go deploy on other BBT service rather than use SBS Citaro reg.

  • 24 June 2017 at 9:15 AM

    This morning (8.29 a.m.) when I alighted at Bus Stop 43701 from Bus No.187, immediately to see SBM 3002K driven by an Indian driver over take the 187 without slowing down as everyday many of the commuters have to transfer to No. 189 at that Bus stop to Bukit Crescent area for work. As such, we have to wait for another 10 mins. for Bus 189 (SBM 3005C) to arrive.

    As the bus is totally no packed, I am very disappointed that the driver is so impatient and just over take without slowing for other commuters to board. I hope this will not happen again.


    • 9 March 2022 at 4:22 PM

      I’m very late to this, but please refer such to the relevant bus company/companies (in this case, I believe it is SMRT/TT) in future.

      Thank you!


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