Singapore Buses route 166

Service 166 is a major trunk route connecting the residential estates of Tengah, Jurong East, Clementi and Dover to the Central areas of Bras Basah, Clarke Quay, Outram Park and HarbourFront.

Demand has extensively been dropped for the section from Ang Mo Kio to Bugis when the Circle Line opened, and some of the double deckers were vanished from October 2011.