Dumbarton Bridge (California)

Dumbarton Bridge
Dumbarton Bridge
	Aerial view of the Dumbarton Bridge
Coordinates	37°30′25″N 122°07′01″W / 37.5069°N 122.1169°W
Carries	6 lanes of SR 84; Bicycles and pedestrians;
Crosses	San Francisco Bay
Locale	Menlo Park, California and Fremont, California
Owner	State of California
Maintained by	California Department of Transportation and the Bay Area Toll Authority
Website	www.bayareafastrak.org
Characteristics
Design	Twin girder bridge
Material	Concrete
Total length	2,621.28 meters (8,600.0 feet), 1.63 miles
Longest span	103.63 meters (340.0 feet)
Clearance below	25.91 meters (85.0 feet) (main span)
History
Opened	October 1982
Statistics
Daily traffic	70,000+ (auto); 118 (bike & pedestrian)
Toll	Westbound only; FasTrak or pay-by-plate, cash not accepted; Effective January 1, 2022 – December 31, 2024:; $7.00; $3.50 (carpool rush hours, FasTrak only);
Location

The Dumbarton Bridge is the southernmost of the highway bridges across San Francisco Bay in California. Carrying over 70,000 vehicles^[1] and about 118 pedestrian and bicycle crossings daily^[2] (384 on weekends^[3]), it is the shortest bridge across San Francisco Bay at 1.63 miles (8,600 ft; 2,620 m). Its eastern end is in Fremont, near Newark in the San Francisco Bay National Wildlife Refuge, and its western end is in Menlo Park. Bridging State Route 84 across the bay, it has three lanes each way and a separated bike/pedestrian lane along its south side. Like the San Mateo Bridge to the north, power lines parallel the bridge.

^ Dumbarton Transportation Corridor Study (PDF) (Report). San Mateo County Transit District. November 2017. Archived from the original (PDF) on November 9, 2019. Retrieved March 3, 2019.
^ Spotswood, Dick (8 May 2018). "Dick Spotswood: Richmond bridge third lane is working, but more needs to be done". Marin Independent Journal. Retrieved 9 May 2018.
^ "Bridge Bicycle/Pedestrian Path Counter Data". Metropolitan Transportation Commission. 17 March 2021. Retrieved 28 March 2021.

[dumbarton-study-2017-1] Dumbarton Transportation Corridor Study (PDF) (Report). San Mateo County Transit District. November 2017. Archived from the original (PDF) on November 9, 2019. Retrieved March 3, 2019.

[2] Spotswood, Dick (8 May 2018). "Dick Spotswood: Richmond bridge third lane is working, but more needs to be done". Marin Independent Journal. Retrieved 9 May 2018.

[3] "Bridge Bicycle/Pedestrian Path Counter Data". Metropolitan Transportation Commission. 17 March 2021. Retrieved 28 March 2021.

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