History of Serangoon Feeder Services
Service 217
| Operator | Year | Date | Service changes |
|---|---|---|---|
| 1977 | 31 October | Introduced between Serangoon Garden Ter and Berwick Dr (Loop). | |
| 1988 | 13 March | Amended to Serangoon Int. | |
| 1996 | 9 March | Amended to ply Upp Serangoon Rd and Boundary Rd and re-numbered Service 317. |
Service 312
| Operator | Year | Date | Service changes |
|---|---|---|---|
| 1985 | 22 December | Introduced between Serangoon Ave 3 Ter and Upp Serangoon Rd (Loop). | |
| 1988 | 13 March | Amended to start from Serangoon Int and loop at Serangoon Ave 3. | |
| 24 April | Serves new bus stop along Serangoon Ave 3. | ||
| 1992 | 3 May | Integrated with Service 105 and withdrawn under TransitLink Network Integration Exercise Phase 7. |
Service 315 
| Operator | Year | Date | Service changes |
|---|---|---|---|
| 1984 | 2 December | Introduced between Serangoon Garden Ter and Serangoon Ave 5 (Loop). | |
| 1985 | 22 April | Amended to ply the extended Serangoon Ave 5, skipping Ang Mo Kio Ave 3 and Yio Chu Kang Rd towards Serangoon Garden Ter. | |
| 1988 | 13 March | Amended to Serangoon Int. | |
| 1989 | 28 May | Integrated with Service 318 and amended to ply Boundary Rd, Lor Chuan and Serangoon Garden Way, skipping Yio Chu Kang Link. | |
| 1995 | 11 June | Extended to loop at Serangoon North Ave 4. | |
| 1997 | TBC | Serves new bus stop outside Blk 112 along Serangoon North Ave 1. | |
| Template:SBS Transit (Current) |
2004 | 3 October | Skips the bus stop outside Blk 206 along Serangoon Central. |
| 2011 | 30 January | Extended to loop at Serangoon North Ave 5. | |
| 3 September | Amended to Serangoon Integrated Transport Hub. | ||
| 26 September | Designated wheelchair-accessible bus service (WAB). |
Service 317 
| Operator | Year | Date | Service changes |
|---|---|---|---|
| 1996 | 9 March | Re-numbered from Service 217 as a service between Serangoon Int and Berwick Dr (Loop). | |
| Template:SBS Transit (Current) |
2003 | 20 June | Serves new bus stop outside Serangoon Stn along Serangoon Central towards Serangoon Int. |
| 2004 | TBC | Serves additional bus stop outside Serangoon Stn along Serangoon Central towards Berwick Dr. | |
| 2011 | 3 September | Amended to Serangoon Integrated Transport Hub. | |
| 26 September | Designated wheelchair-accessible bus service (WAB). |
Service 318
| Operator | Year | Date | Service changes |
|---|---|---|---|
| 1988 | 13 March | Introduced between Serangoon Int and Serangoon Garden Way (Loop). | |
| 1989 | 28 May | Integrated with Service 315 and withdrawn. |