History of Services M1 - M4
Service M1
| Year | Date | Service changes |
|---|---|---|
| 1989 | 11 September | Introduced between North Buona Vista Rd and Mount Sinai Dr (loop), operating on weekdays and Saturdays only. |
| 1993 | TBC | Extended to loop at Science Park Dr. |
| 1994 | TBC | Amended to start from Science Park Dr. |
| 1997 | 5 October | Re-numbered Service 92. (Related change) |
Service M2
| Year | Date | Service changes |
|---|---|---|
| 1989 | 5 November | Introduced between Jln Kembangan and Fidelio St (loop) under Bus-MRT Rationalisation. |
| 1993 | 30 October | Amended to ply Sims Ave East towards Fidelio St, skipping Frankel Ave and Siglap Dr. |
| 1994 | 11 September | Amended to ply Taman Kembangan, skipping Jln Lapang. |
| 1997 | 5 October | Re-numbered Service 42. (Related change) |
Service M3
| Year | Date | Service changes |
|---|---|---|
| 1989 | 6 November | Introduced between Jln Limau Manis and Lucky Heights (loop) under Bus-MRT Rationalisation, operating on weekdays and Saturdays only. |
| 1992 | 30 March | Withdrawn under TransitLink Integration Exercise. |
Service M4
| Year | Date | Service changes |
|---|---|---|
| 1989 | 6 November | Introduced between Eunos Ter and Marine Parade Rd (loop) under Bus-MRT Rationalisation, operating on weekdays and Saturdays only. |
| 11 December | Amended to Eunos Int. | |
| 1992 | TBC | Enhanced to operate on Sundays and Public Holidays. |
| 1997 | 5 October | Integrated with Service 15 and withdrawn. |