📣 As the U.S. is recovering from the COVID-19 pandemic, many transit agencies may continue to have reduced or suspended service. Route information on this site may not reflect all COVID-19 related service changes. Check Twitter feeds for transit agencies for current service updates prior to travel. CDC recommends riders to wear face covering or mask on public transportation.
Alameda-Contra Costa Transit
AC Transit is a major bus system serving the western side of Costa Costa and Alameda counties. It serves the cities of Oakland, Alameda, Albany, Berkeley, El Cerrito, Emeryville, Fremont, Hayward, Newark, Piedmont, Richmond, San Pablo, San Leandro and Union City.
In addition to local service, AC Transit also operates Transbay buses on the Bay Bridge to San Francisco, as well as on the San Mateo – Hayward Bridge and the Dumbarton Bridge to the Peninsula. Most AC Transit bus routes connect with BART.
Enter the Stop ID (shown on the bus stop sign) above.
- 511 and say AC Transit (Bay Area only)
- (510) 839-2931
- (510) 477-0192 (south Alameda County)
- (800) 448-9790
- 1600 Franklin Street
Oakland, CA 94612
- Online contact form
- Customer Service Center
- Oakland: 1600 Franklin Street (ground floor), Oakland, CA 94612
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