Service 400 
/ Short-Trip 400A (2000 - 2008)
- Refer to Bus Service 400 for more details.
Service 401
- Refer to Bus Service 401 for more information.
Service 402 (1975 - 1982)
| Operator
|
Year
|
Date
|
Service changes
|
|
1975
|
11 May
|
Introduced between Stamford Rd (Capitol Theatre) and Bt Timah Race Course (Loop), operating on racing days that fall on Sundays only.
|
| 1982
|
28 February
|
Discontinued.
|
Service 402 (1994 - 1995)
| Operator
|
Year
|
Date
|
Service changes
|
|
|
1994
|
3 September
|
Introduced between Bedok Int and National Service Resort & Country Club (NSRCC) on a 3-month trial period, operating on weekends and public holidays only.
|
| 1995
|
26 February
|
Discontinued.
|
Service 402 (2006 - 2019)
| Operator
|
Route
|
Year
|
Date
|
Service changes
|
|
Marina South Pier ↺ Anson Rd (2006 - 2011)
|
2006
|
1 April
|
Introduced between Marina Sth Pier Ter and Anson Rd (Loop).
|
| 2009
|
18 January
|
Serves relocated bus stop outside Marina Bay Stn along Marina Stn Rd with the partial closure of Marina St to facilitate the construction of the Downtown MRT Line.
|
| 2011
|
27 June
|
Designated wheelchair-accessible bus service (WAB).
|
| Shenton Way ↺ Marina Coastal Dr (2011 - 2019)
|
28 November
|
Amended to start from Shenton Way Ter and loop at Marina Coastal Dr.
|
| 2012
|
14 January
|
Serves reinstated bus stop outside Marina Bay Stn along Marina St.
|
| 13 May
|
Serves new bus stop outside Marina Bay Cruise Ctr along Marina Coastal Dr.
|
| 2013
|
21 April
|
Serves new bus stop opposite Marina Sth Pier along Marina Coastal Dr.
|
| 29 December
|
Amended to ply Marina Blvd/Central Blvd, Marina St, Central Blvd and Shenton Way with the opening of MCE.
|
| 2014
|
28 September
|
Amended to ply Cecil St and Marina Blvd with the road changes in Marina Sth area, skipping Maxwell Rd and Central Blvd.
|
| 2017
|
25 June
|
Amended to the relocated Shenton Way Ter.
|
| 2019
|
16 June
|
Integrated with Service 400 and discontinued.
|
Service 403
- Refer to Bus Service 403 for more details.
Service 404 (1978 - 1980)
| Operator
|
Year
|
Date
|
Service changes
|
|
|
1978
|
4 June
|
Introduced between Jurong Int and Science Ctr Rd (Loop), operating on Sundays and Public Holidays only.
|
| 1980
|
16 June
|
Discontinued.
|
Service 405 (1978 - 1979)
| Operator
|
Year
|
Date
|
Service changes
|
|
|
1978
|
4 June
|
Introduced between Jurong Int and Jln Ahmad Ibrahim (Jurong Bird Pk) (Loop), operating on Sundays and Public Holidays only.
|
| 1979
|
23 December
|
Discontinued.
|
Service 405 (since 1993)
- Refer to Bus Service 405 for more information.
Service 405M (June 2015)
| Operator
|
Year
|
Date
|
Service changes
|
|
|
2015
|
7 June
|
Introduced between Boon Lay Int and Old Choa Chu Kang Rd (Loop) during SEA Games 2015, skipping Lim Chu Kang Rd, operating between 0730 hrs and 1830 hrs. Wheelchair-accessible at launch.
|
| 13 June
|
Discontinued.
|
Service 406 (1978 - 1989)
| Operator
|
Year
|
Date
|
Service changes
|
|
|
1978
|
4 June
|
Introduced between Jurong Int and Chinese Gdn Rd/Japanese Gdn Rd (Loop), operating on Sundays and Public Holidays only.
|
| 1989
|
22 October
|
Integrated with Service 199 and discontinued.
|
Service 450 (1978 - 1990)
| Operator
|
Year
|
Date
|
Service changes
|
|
|
1978
|
3 June
|
Introduced between Jurong Int and Pasir Laba Rd (Loop), operating during Saturday afternoons and during the night on Sundays and Public Holidays.
|
| 1990
|
1 July
|
Discontinued.
|
