History of Services M1 - M4
Service M1
| Date | Service changes |
|---|---|
| 11 September 1989 | Introduced between North Buona Vista Rd and Mt Sinai Dr (loop), operating on weekdays and Saturdays only. |
| 1993 | Extended to loop at Science Park Dr. |
| 1994 | Amended to start from Science Park Dr. |
| 1 December 1997 | Re-numbered Service 92. (Related change) |
Service M2
| Date | Service changes |
|---|---|
| 5 November 1989 | Introduced between Jln Kembangan and Fidelio St (loop) under Bus-MRT Rationalisation. |
| 30 October 1993 | Amended to ply Sims Ave East towards Fidelio St, skipping Frankel Ave and Siglap Dr. |
| 11 September 1994 | Amended to ply Taman Kembangan, skipping Jln Lapang. |
| 1 December 1997 | Re-numbered Service 42. (Related change) |
Service M3
| Date | Service changes |
|---|---|
| 5 November 1989 | Introduced between Bedok Gdns and Lucky Gdns (loop) under Bus-MRT Rationalisation, operating on weekdays and Saturdays only. |
| 29 March 1992 | Withdrawn under TransitLink Integration Exercise. |
Service M4
| Date | Service changes |
|---|---|
| 5 November 1989 | Introduced between Eunos and Marine Parade Rd (loop) under Bus-MRT Rationalisation, operating on weekdays and Saturdays only. |
| 10 December 1989 | Amended to Eunos Int. |
| 1992 | Enhanced to operate on Sundays and public holidays. |
| 1 December 1997 | Merged with Service 15 and withdrawn. |