This page covers present-day ISB services only. Timeline of amendments can be found on the individual bus article pages.
Cut-Off Dates for Current Routing:
- A1: Unknown
- A2: ~2015
- B1
| Year | Direction 1 | Direction 2 |
| ??? | Prince George’s Park Ter, Prince George’s Park, Business Link, Kent Ridge Dr, Computing Dr, Carpark 15, Kent Ridge Dr, Kent Ridge Cres (Loop at Conservatory Dr), Lower Kent Ridge Rd, South Buona Vista Rd, Prince George’s Park and Prince George’s Park Ter. | |
| ~2015 | Prince George’s Park Ter, Prince George’s Park, Business Link, Kent Ridge Dr, Computing Dr, Kent Ridge Dr, Kent Ridge Cres (Loop at Conservatory Dr), Lower Kent Ridge Rd, South Buona Vista Rd, Prince George’s Park and Prince George’s Park Ter. | |