Singapore Buses route 851

Service 851 is a trunk route between Yishun Interchange and Bukit Merah Interchange, passing through Lentor, Ang Mo Kio, Thomson, Rochor Canal, City Hall, Chinatown and Tiong Bahru.

Service 851 is an inter-town route serving between the housing estates of Yishun, Ang Mo Kio, Marymount, Thomson, Bukit Merah and Tiong Bahru with connections to the City areas, namely Chinatown, Bras Basah and Rochor Canal. The route is frequented as a popular connection between various housing estates, as well as between housing estates and the City. Some of which were transferred to the North South Line after exercising their reliability.

Fleet
Originally, it used to have 12 bendies – TIB976S, TIB1023K, TIB1054X, TIB1055T, TIB1057M, TIB1096A, TIB1099S, TIB1112L, TIB1113J, TIB1124C, TIB1138M and TIB1147L; now it was downgraded to seven bendies in total.

Service 851 uses MAN NL323F single deckers, MAN NG363F bendy buses. The MAN NL323F single deckers for their shorter urban services and elderly old folks, whereas Mercedes-Benz O405G (Hispano Habit) articulated buses are meant for their longer services.