Dumbarton Bridge (California)

Dumbarton Bridge
Aerial view of the Dumbarton Bridge
Coordinates	37°30′25″N 122°07′01″W / 37.5069°N 122.1169°W / 37.5069; -122.1169
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 (2022-01-01 – 2024-12-31): $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.