AC Transit | 511 Contra Costa

AC Transit

AC Transit is a transit agency serving the western portions of Contra Costa County and Alameda counties. The agency also operates Transbay routes to San Francisco and selected areas in San Mateo and Santa Clara counties.

Discounts & Special Offers

Try Transit $20 Clipper Card Offer: Pledge to try transit as an alternative to driving alone to work or campus and receive a pre-loaded $20 Clipper card

Bikes on Buses

All AC Transit buses are equipped with bike racks at the front of the bus. Learn how to load and unload your bike from bus racks.