Dumbarton Express

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. 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.

AC Transit (administrator of the Dumbarton Express), CA

Transit Centers

There are 2 Transit Centers that serve Dumbarton Express.

View Transit Centers

Transit Accessibility Services

The Dumbarton Express fleet is equipped with wheelchair lifts, bicycle racks and Free WiFi.

For Special Free Ride Promotion in San Mateo County visit:


For Special Free Ride Promotion in East Alameda County visit:


If you would like to be placed on the DB email list serve please visit AC Transit ENews

Learn More on ADA Paratransit

511 Phone Service

From the Main Menu, use a shortcut to go directly to Dumbarton Express by saying: "Dumbarton Express"

From inside the Transit Agency menu, you can say any of the following agencies. If you want to use the touch-tone options, press the number "29'' for Dumbarton Express.

Learn More about the 511 Phone Service
Learn More about the Alexa Voice Service for 511

^ Back to top