San Mateo-Hayward Bridge

Efforts to widen the San Mateo-Hayward Bridge have significantly improved evening commutes on State Route 92 between San Mateo and Alameda counties.

Once one of the busiest evening commutes in the Bay Area, the San Mateo-Hayward Bridge saw enormous improvements in traffic flow with the completion of the bridge’s widening in January 2003.

Funded as part of the Bay Area Transit Authority’s (BATA) Regional Measure 1 (RM1) program, the low-rise trestle portion of the bridge was widened from four to six lanes to match the configuration of the high-rise portion of the bridge.

As part of the effort to improve traffic flow and to relieve congestion on the bridge and the roads that lead to it, the RM1-funded Interstate 880/State Route 92 interchange in Hayward was completed in October 2011.

Safety on the San Mateo-Hayward bridge has been improved with the addition of full shoulders along both low-rise trestles providing a better space for disabled vehicles.

Bridge Tolls

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A toll plaza at dusk
Seismic Safety

The seismic safety of the bridge was increased by Caltrans’ completion of its bridge retrofit project in 2000.

Seismic retrofit work on the San Mateo-Hayward Bridge

Bridge Facts At-A-Glance

Location: State Route 92 between San Mateo and Alameda counties
Structure: Steel box girder and concrete trestle approach spans
Length: Highrise steel girder spans 1.9 miles, lowrise trestle portion 5.1 miles
Vertical Clearance: 135 feet
Channel Span: 750 feet
Opened: October 1967, widened 2003
  • Original structure: $70 million
  • Widened structure: $200 million
Auto Toll: $7
Carpools: $3.50
Collection: One way, westbound in Hayward
Traffic Lanes: Three in each direction
FY 2022-23 Total Toll-Paid Vehicles: 15,863,052
FY 2022-23 Total Tolls Collected: $107,175,927
Monthly Transportation Statistics

See vehicle traffic and public transit ridership numbers from 2019 to the present.

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Regional Measure 1

Regional Measure 1, approved by Bay Area voters in 1988, raised tolls on the Bay Area’s seven state-owned toll bridges to fund bridge improvements and parkway construction.