Benicia-Martinez Bridge | About MTC

Benicia-Martinez Bridge

Benicia-Martinez Bridge
Benicia-Martinez Bridge

While it took a half-century of traffic growth to require a bridge to replace the ferries crossing the Carquinez Strait between Benicia and Martinez, it took only a couple of decades for ballooning traffic on Interstates 680 and 780 to overwhelm the Benicia-Martinez Bridge, also known as the George Miller Jr. Bridge.

To accommodate the growth BATA and Caltrans, as part of the RM 1 program, completed a second parallel span that carries five lanes of northbound traffic. The second span opened to traffic on August 25, 2007 and is named in honor of Congressman George Miller, who is the son of late State Assemblymember and state Senator George Miller, Jr. In addition, a new toll plaza was constructed and features Northern California's first open road tolling system, allowing FasTrak customers to travel through the toll plaza at freeway speeds.

The original span was seismically retrofitted and then converted to carry four lanes of southbound traffic as well as a new bicycle and pedestrian pathway that opened on August 29, 2009.

Bridge Facts At-A-Glance
LOCATION: Interstate 680 between Solano and Contra Costa counties
STRUCTURE: Deck truss
LENGTH: 1.2 miles
CHANNEL SPAN: 528 feet


September 1962 (widened in 1991, parallel structure in 2007)
  • Original Structure - $25 million
  • 2007 Parallel Structure- $1.2 billion
COLLECTION: One-way, northbound in Martinez
TRAFFIC LANES: Three in southern direction, five in northern direction
FY 2018-19 TOTAL TOLL-PAID VEHICLES: 21,192,384
FY 2018-19 TOTAL TOLLS COLLECTED: $122,509,930
BRIDGE PATH COUNTER DATA: Access bicycle and pedestrian counter data