Shortworking Trip Services (SWT)

Shortworking trip services, or SWTs, are short haul supplementary trips which ply segments of their parent route rather than the full route of their parent service. Due to the lengthy nature of most bus routes, SWTs are needed to cater to specialized sectors, rather than improving bus frequencies throughout the route. This helps to better allocate resources to where they are needed.

Most SWTs cater to sectors of bus routes encountering high demand, for example, between MRT stations and housing estates / industrial estates / institutions. These SWTs operate during the weekday peak hours. Other SWTs operate late at night, after the last bus of their parent service has departed. These services usually cater to residential sectors of long trunk routes. Finally, there are SWTs that only operate on weekends and special occasions, catering to unique sectors of route encountering high demand.

SWTs can be identified by adding an alphabetical suffix at the end of its parent service. The letters A and B are the most common, while other suffixes (like W) are less common. The suffix M is usually reserved for route variants and not for SWTs. However, not all A and B suffixed routes are SWTs; exceptions include 700A and 859A/859B.

For pictures, visit our (incomplete) Shortworking Trip Services (SWT) Gallery.

Currently, SWTs can be divided into four broad categories based on their operating hours:

  1. AM Peak Shortworking trips
  2. PM Peak Shortworking trips
  3. Weekends/Special Shortworking Trips
  4. “Last bus” Shortworking trips

This list is not exhaustive and some SWTs can fall into multiple categories.

List of SBS Transit Shortworking trips in numerical order:

Service Route Category
3A Tampines Interchange → Pasir Ris Drive 12 (Blk 747A) 2, 4
3B Pasir Ris Drive 1 (Blk 738) → Pasir Ris Interchange 1
9A Bedok Interchange → Loyang Avenue (Blk 149A) 2
13A Ang Mo Kio Avenue 6 (Aft Blk 304) → Bishan Road (Bishan Stn) 1
14A Bedok Interchange → Grange Road (Natl Youth Council) 3
15A Pasir Ris Interchange → Jalan Eunos (Opp Eunos Stn) 1
21A Geylang Road (Bef Lor 18 Geylang) → Kitchener Road (Bef Tai Hoe Hotel) 3
27A Sengkang East Avenue (Blk 203B) → Tampines Avenue 4 (Opp Century Square) 1
29A Tampines Interchange → Tampines Avenue 7 (Blk 497D) 2
31A Tampines Interchange → New Upper Changi Road (Tanah Merah Stn) 1
33A Kent Ridge Terminal → Tiong Bahru Road (Blk 1) 2
33B Bedok Interchange → Joo Chiat Place (After Tembeling Road) 3
34A Punggol Interchange → Tampines Avenue 5 (Opp Tampines Stadium) 1
36A Changi Airport PTB2 (PTB2 Basement) → Tomlinson Road (The Regent S’pore) 4
36B Marine Parade Road (Lagoon View) → Siglap Rd (Opp Mandarin Gardens), via Tomlinson Road 1, 2
45A Lorong Ah Soo (Opp Blk 115) → Upp Serangoon Road (Serangoon Stn) 1
51A Jurong East Interchange → Pandan Gardens (Blk 407) 4
55A Bishan Interchange → Marine Parade Road (Victoria Sch) 4
55B Bishan Interchange → Ang Mo Kio Avenue 10 (Blk 443) 2
60A Eunos Interchange → Bedok Reservoir Road (Blk 608) 2
62A Punggol Interchange → Aljunied Road (Aljunied Stn) 2
66A Bedok Interchange → Bukit Timah Road (Little India Stn) 3
66B Jurong East Interchange → Serangoon Road (Tekka Ctr) 3
70A Yio Chu Kang Interchange→ Temasek Ave (Opp The Ritz-Carlton) 4
70B Yio Chu Kang Road (Opp Serenity Pk) → Serangoon Central (Serangoon Stn) 1
72A Yio Chu Kang Interchange → Hougang Central (opp Hougang Ctrl Int) 1
72B Yio Chu Kang Interchange → Ang Mo Kio Avenue 5 (ITE College Central) 1
76A Yio Chu Kang Terminal → Marine Terrace (Opp CHIJ Katong Convent) 4
78A Jurong East Temporary Interchange → Tanjong Penjuru (ECS Freight Services) 1
80A Sengkang Interchange → Aljunied Road (Aljunied Stn) 1
88A Punggol Road (Blk 190C) → Ang Mo Kio Avenue 3 (Opp Ang Mo Kio Stn) 1
88B Ang Mo Kio Avenue 6 (Blk 207) → Ang Mo Kio Avenue 5 (Bef Yio Chu Kang Rd) 1
90A Toa Payoh Interchange → Airport Road (Paya Lebar Air Base) 1
92A Ghim Moh Terminal → Ghim Moh Road (Blk 13) 2
92B Ghim Moh Terminal → Science Park Drive (Opp The Rutherford) 1, 2, 3
94A Eunos Interchange → Airport Road (Bef RSAF Roundabout) 1, 3
95B Kent Ridge Terminal → North Buona Vista Road (Buona Vista Stn) 2
96A Clementi Interchange → Kent Ridge Crescent (NUS Raffles Hall) 1
96B Clementi Interchange → Commonwealth Avenue West (Clementi Station), via National University of Singapore 2
98A Boon Lay Way (Lakeside Stn) → Corporation Road (Corporation Pl) 2
98B Jurong West Ave 1 (Blk 490) → Jurong Pier Way (Jurong Island Checkpt) 1
100A Serangoon Interchange → Aljunied Road (Aljunied Stn) 1, 2
105B Jurong East Interchange → Commonwealth Avenue West (Clementi Stn) 1
109A Serangoon Interchange → Hougang Avenue 4 (Blk 913) 2
112A Hougang Central Interchange → Upper Serangoon Road (Kovan Station) 4
113A AM Peak:
Upp Paya Lebar Rd (Blk 161) → Upp Serangoon Rd (Kovan MRT Stn)
PM Peak:
Upp Serangoon Rd (Kovan MRT Stn) → Upp Serangoon Rd (Kovan MRT Stn), via Hougang Street 11
1, 2
125A Aljunied Road (Opp Aljunied Stn) → Macpherson Road (Bef Siemens Ctr) 1
130A Ang Mo Kio Interchange → Sin Ming Road (Blk 25) 3
131A St. Michael’s Terminal → Shenton Way (Opp Temasek Twr) 1
135A Ang Mo Kio Interchange → Marine Parade Road (Victoria Sch) 4
138A Ang Mo Kio Interchange → Mandai Lake Road (Singapore Zoo) 3
138B Ang Mo Kio Int → Ang Mo Kio Ave 5 (Opp Blk 604) 2
145A Tiong Bahru Road (Redhill Stn) → Henderson Road (Blk 1) 1
147A Hougang Central Interchange → New Bridge Road (Opp Pearl’s Centre) 1
154A Yung Ho Road (Blk 151) → Boon Lay Way (Lakeside Stn) 1
154B Commonwealth Avenue West (Clementi Stn) → Clementi Road (Ngee Ann Poly) 1
155A Toa Payoh Interchange → Marine Parade Road (Victoria School) 4
158A Aljunied Road (Aljunied Stn) → Aljunied Road (Opp Aljunied Stn),
via Tanjong Rhu
1, 2
159A Sengkang Interchange → Ang Mo Kio Ave 8 (Opp Blk 710) 1
159B Ang Mo Kio Ave 8 (Jubilee) → Ang Mo Kio Ave 5 (ITE College Central) 1
179A AM Peak:
Boon Lay Interchange → Nanyang Drive (Hall 4)
PM Peak:
Lien Ying Chow Drive (Hall 1) → Boon Lay Interchange
Express along Jurong West St 63 & Pioneer Road North in both directions
1, 2
183B Jurong East Interchange → Toh Tuck Avenue (Ulu Pandan R.I. Plant) 1
195A Marina Centre Terminal → Tiong Bahru Road (Tiong Bahru Plaza), via Commonwealth Drive 1, 2, 3
195B Marina Centre Terminal → Commonwealth Drive (Opp Blk 115B)
196A Bedok Interchange → Shenton Way (Opp MAS Bldg) 1
198A Boon Lay Interchange → Jurong East Avenue 1 (Opp Parc Oasis) 2
222A Bedok Interchange → New Upper Changi Road (84039 Bedok Stn) 1
240A Corporation Drive (Blk 65) → Boon Lay Way (Lakeside Stn) 1
241A Jurong West Street 91 (Blk 962) → Jurong West Street 63 (Blk 649A) 1
268A Ang Mo Kio Depot → Ang Mo Kio Avenue 5 (Techplace 2) 1
269A Ang Mo Kio Interchange → Ang Mo Kio Street 61 (Mkt/FC) 2
502A Soon Lee Bus Park → Central Boulevard (Downtown Stn)
Roads skipped: Jurong West/East Ave 1, Toh Guan Road & Boon Lay Way.
1
518A Pasir Ris Interchange → Bayfront Avenue (Opp Marina Bay Sands MICE)
Roads skipped: Tampines Ave 7/2/1 & Bedok North Road
1

Services 502A and 518A are better classified as route variants rather than shortworking trips, but are mentioned here since they appear under Shortworking trips on SBS Transit’s website.

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List of SMRT Shortworking trips in numerical order:

Service Route Category
67A Choa Chu Kang Interchange → Dunearn Road (Opp Coronation Plaza) 1
67W Route A:
Choa Chu Kang Interchange → Bukit Timah Road (Little India Stn)
Route B:
Tampines Interchange → Bukit Timah Road (Little India Stn)
3
75A Bukit Panjang Road (Blk 604) → Clementi Road (Opp SIM HQ) 1
106A Bukit Batok Interchange → Commonwealth Avenue West (Clementi MRT) 1
169A Woodlands Regional Interchange → Yishun Avenue 2 (Aft NorthPoint Shop Ctr) 1
173A Bukit Batok Interchange → Bukit Batok East Avenue 4 (Blk 254) 4
177A Bukit Batok Interchange → Jelebu Road (Bt Panjang Plaza) 1, 2
178A Woodlands Regional Interchange → Woodlands Road (Kranji Stn) 1
180A Boon Lay Interchange → Bukit Panjang Road (Blk 183) 2
189A Bukit Batok Interchange → Bukit Batok Street 23 (Opp Midview Bldg) 1, 4
190A Choa Chu Kang Interchange → Orchard Road (Dhoby Ghaut MRT) 1
302A Choa Chu Kang Drive (Yew Tee Stn) → Choa Chu Kang Drive (opp Yew Tee Stn) 1, 2
811A Yishun Interchange → Yishun Avenue 5 (Blk 145) 2
857A Yishun Interchange → Yio Chu Kang Road (Opp Sunrise Gdns) 1
858A Woodlands Regional Interchange → Yishun Avenue 2 (Aft NorthPoint Shop Ctr) 4
858B Jalan Kayu (Bef Seletar Camp G) → Jalan Kayu (Aft Seletar Camp G) 1
860A Yishun Temporary Interchange → Yishun Ring Rd (Opp Blk 798)
882A Sembawang Interchange → Montreal Link (Blk 592A) 2
962A Woodlands Regional Interchange → Sembawang Drive (Opp Blk 484A CP) 1
962B Sembawang Drive (Opp Sun Plaza) → Sembawang Drive (Sun Plaza), via Admiralty St 1, 2
965A Woodlands Regional Interchange → Yishun Avenue 2 (Aft NorthPoint Shop Ctr) 1, 2
969A Tampines Interchange → Yishun Avenue 2 (Yishun Stn) 1, 2
972A Bukit Panjang Road (Opp Blk 183) → Orchard Road (Dhoby Ghaut Stn) 4
975A Petir Rd (Bt Panjang Stn) → Lorong Rusuk (Aft Old Lim Chu Kang Rd) 1, 2

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Bus operators will withdraw SWTs when they are no longer needed. Usually, there are no press releases and the service will cease to operate. Information regarding the SWT will be removed from company websites and from enroute bus stops.

Some of the bus stops indicated may have been renamed, but their general location remains the same.

On rare occasions, ‘withdrawn’ SWTs (which actually slip into oblivion) may make a comeback. Such was the case of SBS Service 170A which disappeared in the early 2000s, only to reappear in 2014. As of October 2014, 170A is not listed on SBS Transit’s website.

List of withdrawn SWTs (not exhaustive):

  • 2A: Changi Village Terminal → New Upper Changi Road (Bedok Stn) – 2
  • 14B: Bedok Interchange → Upper East Coast Road (Fairview Ct??) – 1
  • 13A (1stGen): Yio Chu Kang Terminal → Sims Avenue (Eunos Stn) – ?
  • 15B: Jalan Eunos (Eunos Stn) → Kaki Bukit Avenue 1 (Opp Blk 150) – ?
  • 16A: Bukit Merah Interchange → Siglap Rd (Opp Mandarin Gdns) – 4
  • 16B: Bukit Merah Interchange → Bras Basah Road (Raffles Hotel) – 1
  • 23A: Tampines Interchange → Tampines Avenue 1 (Temasek Poly West G) – 1
  • 25A: Ang Mo Kio Interchange → Hougang Avenue 3 (aft Kim Chuan Rd) – 1
  • 30A: Bedok Interchange → Fort Road (Opp Fort Gdns) – 1
  • 30B: Boon Lay Interchange → Telok Blangah Road (Opp Vivocity) – 1
  • 43A: Buangkok Green (Blk 565) → Serangoon Central (Serangoon Stn) – 1
  • 53A: Hougang Avenue 1 (Opp Blk 232) → Serangoon Central (Blk 261) – 1
  • 53B: Serangoon Central (Blk 206) → Hougang Ave 1 (Blk 232) – 2
  • 54A: Bishan Street 22 (Blk 246) → Bishan Road (Bishan Stn) – 1
  • 67C: Tampines Interchange → Geylang Road (Blk 14 Mkt/FC) – ?
  • 69A: Bedok Interchange → Tampines Avenue 1 (Temasek Poly) – 1
  • 74A: Hougang Central Interchange → Clementi Road (Opp Ngee Ann Poly) – 1
  • 77A: Bukit Batok Interchange → Toh Tuck Road (Opp Canadian Intl Sch) or Jurong Inst – 1
  • 82A: Serangoon Interchange → Punggol Central – 4
  • 83A: Punggol Interchange → Sengkang Interchange – 4
  • 85A: Sengkang Interchange → Upper Serangoon Road (Blk 205)
  • 85B: Sengkang Interchange → Jalan Besar (Sim Lim Twr)
  • 86A: Sengkang Interchange → Jalan Kayu (Opp The Hiding Pl) – 1
  • 91A: Buona Vista Terminal → Ayer Rajah Crescent (Ayer Rajah Bus Pk) – 1
  • 95A: North Buona Vista Road (Opp Buona Vista Stn) → Lower Kent Ridge Road (NUH) – 1
  • 95C: North Buona Vista Road (Opp Buona Vista Stn) → Lower Kent Ridge Road (Opp Staff Club) – 1
  • 95D: Kent Ridge Terminal → Holland Road (Holland Village) – 2, 4
  • 97A: Jurong East Interchange → Raffles Avenue (The Esplanade) – 1, 4
  • 97B: Jurong East Interchange → Telok Blangah Road (Opp Vivocity) – 1
  • 98A: Jurong East Interchange ↺ Corporation Road – 1, 2, 4
  • 100B: Ghim Moh Terminal → Telok Blangah Road (Opp Vivocity) – 1
  • 103W: Serangoon Interchange ↺ West Camp Road
  • 105A (?Gen): Serangoon Interchange → Whitley Rd (aft Tanglin CC) – 1
  • 105A (?Gen): Serangoon Interchange → Lorong 2 Toa Payoh (Toa Payoh Stn) – 1
  • 106A (1stGen): Bukit Batok Interchange → Commonwealth Avenue West (Opp SP Blk T1A) – 1
  • 106A (2ndGen): Marina Boulevard (The Sail) → Central Boulevard (Aft Marina Stn Rd) via Bayfront Avenue – 3
  • 107A: Serangoon Interchange → Shenton Way (Opp Temasek Twr) – 1
  • 123A: Bt Purmei Road (Opp Blk 109) → Tiong Bahru Road (Tiong Bahru Plaza) – 1
  • 123B: Tiong Bahru Road (Opp Tiong Bahru Plaza) → Bukit Purmei Avenue – 3
  • 124A: St Michael’s Terminal → Telok Blangah Drive (Blk 50) – 4
  • 131B: Serangoon Road → Norfolk Road – ?
  • 133A: Ang Mo Kio Interchange → Raffles Avenue (The Esplanade) – 1, 4
  • 139A: Toa Payoh Interchange → Kim Keat Road (Opp Jumbo Ind Bldg) – 2
  • 143A: Jurong East Interchange → Teban Gardens Road (Bef Hasanah Mosque) – 4
  • 147A (1stGen): Hougang Central Terminal → Serangoon Central (Blk 206) – 1
  • 151A: Kent Ridge Terminal → Dunearn Road (Aft Kheam Hock Rd) – 2
  • 153A: Hougang Central Interchange → Lorong 2 Toa Payoh (Toa Payoh Stn) – 1
  • 154A (1stGen): Boon Lay Interchange → Clementi Road (Ngee Ann Poly) – 1
  • 156A (1stGen): Serangoon Interchange → Bishan Road (Bishan Stn)
  • 156A (2ndGen): Sengkang Interchange → Thomson Road (Opp Old Police Academy) – 1
  • 158A (1stGen): Sims Ave (Aft Lor 1 Geylang) → Tanjong Rhu Road (Opp Dunman High Sch)
  • 158B: Tanjong Rhu Road (Dunman High Sch) → Aljunied Road (Opp Aljunied Stn) – 2
  • 162A: Yio Chu Kang Terminal – Sin Ming Road – ?
  • 163A: Sengkang Interchange → Fernvale Lane (Blk 403A) – 3
  • 170A: Queen Street Terminal → Woodlands Centre Road (Opp Blk 1A)
  • 173A: Jln Anak Bukit → Clementi Int, Clementi Ave 3 (bef Upp Bt Timah) → Jln Jurong Kechil – 1
  • 173K: Bukit Batok Interchange → Toh Tuck Avenue (Green Lodge Mans) [Ends at Canadian Int’l School]
  • 183A: Commonwealth Avenue West (Clementi Stn) ↺ Science Park Road – 1
  • 184A: Bukit Panjang Interchange → Clementi Road (Opp Ngee Ann Poly) – 1
  • 187A: Boon Lay Interchange → Bukit Batok Central (Blk 628) – 1
  • 188A: Choa Chu Kang Interchange → Choa Chu Kang Grove (ITE College West) – 1
  • 200A: Buona Vista Terminal → Clementi Road (Kent Ridge Terminal) – 4
  • 400A: Marina Street (Marina Bay Stn) → Marina Mall (Loop) – Ad-hoc
  • 402A: ???
  • 502B: Jurong West Ave 1 (Blk 538) ↔ Marina Center – 1, 2
  • 518B: Tampines Avenue 7 (Blk 370) ↔ Marina Center – 1, 2
  • 811A (1stGen): Yishun Interchange → ITE Yishun – 1
  • 854A: Yishun Interchange → Yio Chu Kang Road (Opp Sunrise Villa) – 1
  • 859A: Sembawang Interchange → Sembawang Vista (Opp Blk 315) – 4
  • 964A: Woodlands Regional Interchange → Woodlands Link (Opp Blk 22) – 1

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Gallery:

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External Links:

Back to Bus Articles

4 thoughts on “Shortworking Trip Services (SWT)

  1. For sbs transit service 170A, I don’t agree with the category listed. I think it should be listed under category 2 and 3 as I saw it in the afternoon once.

  2. 402A was introduced during Kusu Season when marina south pier first opened, route was from Marina Bay MRT Marina South Pier. Operated for the first year only; never appeared again

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