- 2 extra buses.
- 1 Service 89 DD will perform one (1) crossover trip on City Direct 672 during Weekdays AM Peak, departing (Bus Stop 64431 - Blk 568) at 0735 hours.
- 2 Service 89 buses will perform one (1) down-route trip as Service 89 from Hougang Avenue 10 (Bus Stop 64021 - Blk 458) towards Hougang Central Interchange via Airport Cargo Road before Weekdays AM Peak, departing at 0519 hours & 0528 hours.
- 3 Service 89 buses will perform one (1) down-route trip as Service 89 from Pasir Ris Drive 3 (Bus Stop 98101 - Loyang Pt) towards Hougang Central Interchange before & during Sundays & Public Holidays AM Peak, departing at 0535 hours, 0557 hours & 0619 hours.
- 4 Service 89 buses will perform one (1) down-route trip as Service 89 from Pasir Ris Drive 1 (Bus Stop 77289 - Blk 738) towards Hougang Central Interchange via Airport Cargo Road during Weekdays AM Peak & Off-Peak, departing at 0757 hours, 0812 hours, 1526 hours & 1603 hours.
- 4 Service 89 buses will perform one (1) down-route trip as Service 89 from Pasir Ris Drive 3 (Bus Stop 98101 - Loyang Pt) towards Hougang Central Interchange before & during Saturdays AM Peak, departing at 0535 hours, 0554 hours, 0612 hours & 0631 hours.
- 6 Service 89 buses will perform one (1) down-route trip as Service 89 from Pasir Ris Drive 3 (Bus Stop 98101 - Loyang Pt) towards Hougang Central Interchange before & during Weekdays AM Peak, departing between 0535 hours & 0637 hours.
- SBS3141H, SBS3840Z (Service 89) & several other Service 89 buses will perform sharebus trips on Service 153 on Weekdays.
- Several Service 89 buses will perform supplementary trips as Service 89e during Weekdays AM Off-Peak.
- Several Service 89 buses will perform supplementary trips as Short Trip 89A before & during Weekdays AM Peak.
- SBS3761T (Service 153) & 1 Service 153 DD will perform one (1) crossover trip on Service 89 during Weekdays AM Peak, departing at 0732 hours & 0711 hours respectively.
- SG5955A (Service 102) will perform sharebus trips on Service 89 on Weekdays.
- Several Service 153 DDs will perform sharebus trips on Service 89 on Weekdays.
- Several random SDs will perform crossover trips on Service 89 on Weekdays.
- Several SDs will operate on Service 89 on Weekends & Public Holidays.
- SG5901E (City Direct 672), SG6004M & SG6005K (City Direct 671) & 1 City Direct 660 DD will operate on Service 89 on Weekends & Public Holidays.
- This service practises jumpbus on Weekdays.
- Weekdays: 10A-9P / 17S / 3E / 4 TBC (34 buses)
- Saturdays: 10A-9P / 1S / 3T (14 buses)
- Sundays & Public Holidays: 9A-9P / 2T (11 buses)
- Special Weekdays: 12A-9P / 10S (22 buses)
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