The Dumbarton Express service consists of two bus lines, the DB and DB1. It is administered and governed by AC Transit, with oversight by the Dumbarton Bridge Regional Operations Consortium (DBROC), comprised of AC Transit, Santa Clara Valley Transportation Authority (VTA), BART, SamTrans, and Union City Transit. Operated and maintained by MV Transportation, the Dumbarton Express is funded by Regional Measure 2.
Click here for current fares on the Dumbarton Express.
Local Service Areas
In the East Bay, local service is offered along the entire route between the Union City BART station and the Ardenwood Park & Ride Lot. On the Peninsula, local service is provided along the entire route between Stanford Research Park and Hamilton/Willow Rd.
The Dumbarton Express does not operate on Saturdays or Sundays. During the week, service on both lines is from approximately 5:30 a.m. to 8:45 p.m. with buses about every 20 minutes during peak travel periods. Check the DB schedule or the DB1 schedule for exact times.
The service does not run on the following holidays: New Year’s Day, Presidents Day, Memorial Day, Fourth of July, Labor Day, Thanksgiving Day, and Christmas Day.