Singapore Buses route 89

Service 89 is a circular trunk route connecting Hougang Central and Changi Airfreight Centre, passing through Sengkang, TPE, Pasir Ris, Loyang Avenue and Nicoll Drive, with an express sector on the PIE between Punggol Road and Pasir Ris Drive 12. It provides inter-connectivity services at Hougang, Sengkang, Pasir Ris and Changi Village, and also passes through the Ballota Park, of which it is Dennis Mok's house.

It uses a lot of Honda Odyssey, later replaced by Dodge Grand Caravans since 2006. The Honda Odysseys were redeployed to other routes such as in Braddell Depot and Ang Mo Kio Depot, later moved to Bukit Batok Depot.

Since 11 September 2015, it has been declared wheelchair-accessible, more of the Volvo Olympians introduced and the new student, Sheryl Hope Teo took over the route. It uses Volvo B9TL (Wrights) and prior to that is Dennis Trident 3s and Volvo Olympians.

Changi Airfreight Centre
Changi Airfreight Centre (formerly Changi Airport Cargo Complex) is a restricted area and only staff with valid passes are allowed to enter. Auxiliary police officers will board the bus to check for staff passes at the Police Pass Office along Airline Road. Visitors who do not have a pass are to alight and re-board the bus after it returns from completing its loop within the Airfreight Centre (at a separate bus stop opposite Police Pass Office).

Upon tapping out of the bus, the exit reader will display “Ride Suspended”. It will resume the journey when one taps onboard the same service after the bus comes out of the Airfreight Centre. Cash-paying passengers will still have to pay a full fare to their journey after they board the bus.