Dumbarton Express

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Bus service in the San Francisco Bay Area

title: "Dumbarton Express" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["bus-transportation-in-california", "public-transportation-in-alameda-county,-california", "public-transportation-in-santa-clara-county,-california"] description: "Bus service in the San Francisco Bay Area" topic_path: "sports" source: "https://en.wikipedia.org/wiki/Dumbarton_Express" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Bus service in the San Francisco Bay Area ::

::data[format=table title="Infobox bus transit"]

FieldValue
nameDumbarton Express
logoDumbarton Express logo.jpg
logo_size200px
imageDumbarton Express bus at Union City station, July 2018.JPG
image_captionDumbarton Express bus at Union City station
founded
localeSan Francisco Bay Area
service_areaAlameda, San Mateo, and Santa Clara Counties
service_typeBus service
routes2
operatorMV Transportation
website
::

| name = Dumbarton Express | logo = Dumbarton Express logo.jpg | logo_size = 200px | image = Dumbarton Express bus at Union City station, July 2018.JPG | image_caption = Dumbarton Express bus at Union City station | founded = | locale = San Francisco Bay Area | service_area = Alameda, San Mateo, and Santa Clara Counties | service_type = Bus service | routes = 2 | operator = MV Transportation | website =

Dumbarton Express is a regional public transit service in the San Francisco Bay Area connecting Alameda, San Mateo, and Santa Clara Counties via the Dumbarton Bridge, the system's namesake. The bus service is funded by a consortium of five transit agencies (AC Transit, BART, SamTrans, Union City Transit, and VTA). Dumbarton Express is administered by AC Transit and operated under contract by MV Transportation.

Service

Dumbarton Express operates two weekday-only routes:

Dumbarton Express allows passengers to ride locally in the East Bay and Peninsula, without crossing the bridge.

History

::figure[src="https://upload.wikimedia.org/wikipedia/commons/0/02/Dumbarton_Express.jpg" caption="Dumbarton Express bus in 2004"] ::

AC Transit began operating peak-hour service between Union City station and Palo Alto station on September 10, 1984. The yearlong trial service was funded by the Metropolitan Transportation Commission. The DB1 route serving the Stanford Research Park was added within a year. By 1987, route DB was also extended to the industrial park via a different route. A private company took over operations in January 1989, with AC Transit continuing to administer the service.

In 1993, five transit agencies (AC Transit, BART, SamTrans, Union City Transit, and VTA) formed a consortium to fund the service. The route saw low ridership and was discontinued on June 30, 2001. AC Transit again became the service operator in March 2005.

AC Transit introduced a separate Dumbarton Bridge transbay service, route U, on August 29, 2004. Not part of the Dumbarton Express brand, it serves Fremont station rather than Union City station. The route M extension was discontinued on March 28, 2010. It was replaced with AC Transit route DA between Ardenwood and Redwood Shores, which operated until December 15, 2013.

By 2009, some reverse-peak trips (eastbound in the morning and westbound in the afternoon) were routed via East Palo Alto and designated DB3. On December 19, 2011, route DB3 was discontinued, and MV Transportation replaced AC Transit as the operator of Dumbarton Express service. At that time, the service cost $2.1 million annually to operate, of which fare revenues covered $0.5 million.

On August 2, 2017, SamTrans released a study that examined the feasibility of adding additional bus routes to the service. The study recommended two new bus routes: an express route traveling between Union City station and Redwood City Caltrain station, and a local route between the Union City BART station to job centers in northern Mountain View and Sunnyvale. The introduction of the two routes was expected to more than double Dumbarton Express ridership. Rail service between Redwood City and Union City on the Dumbarton Rail Corridor is also proposed.

References

References

  1. "Route Map". Dumbarton Express.
  2. "Fares and Passes".
  3. (September 10, 2010). "Authorize the Interim General Manager to Enter Into a Further Nine Month Extension of the Dumbarton Bridge Express Service Cooperative Agreement to June 30, 2011". Alameda-Contra Costa Transit District.
  4. Taylor, Steve. (September 5, 1984). "Buses to cross bridge". The Peninsula Times Tribune.
  5. (December 11, 1984). "Closing in on goal for buses". The Peninsula Times Tribune.
  6. (August 28, 1985). "AC officials search for funding to keep Dumbarton lines running". Oakland Tribune.
  7. Dianda, Mario. (December 14, 1987). "Bridge bus bids due". The Peninsula Times Tribune.
  8. Dianda, Mario. (October 22, 1998). "Express bus service over Dumbarton will continue". The Peninsula Times Tribune.
  9. Abramson, Ronna. (January 9, 1999). "Dumbarton Express offers free bus rides". Oakland Tribune.
  10. (May 23, 2001). "Dumbarton bus line canceled". The Almanac.
  11. Mills, Mike. (June 21, 2001). "Improved schedules for Dumbarton Express buses go into effect Monday, July 2nd". Alameda-Contra Costa Transit District.
  12. (September 23, 2004). "Cruise from Fremont to Stanford on Line U". Alameda-Contra Costa Transit District.
  13. (December 2007). "AC Transit Service Changes Effective December 23, 2007". Alameda-Contra Costa Transit District.
  14. (November 2012). "Inner East Bay Comprehensive Operational Analysis (COA) Transbay Route Profiles". Alameda-Contra Costa Transit District.
  15. (January 18, 2010). "AC Transit Service Changes, March 28, 2010". Alameda-Contra Costa Transit District.
  16. (December 16, 2013). "Better Service in Southern Alameda County!". Alameda-Contra Costa Transit District.
  17. "Line DB3". Alameda-Contra Costa Transit District.
  18. (November 22, 2011). "Minor service changes begin on December 18". Alameda-Contra Costa Transit District.
  19. (December 15, 2011). "Upcoming Changes to Dumbarton Express Service". Alameda-Contra Costa Transit District.
  20. (August 2, 2017). "Dumbarton Transportation Corridor Study". SamTrans.

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