Martinez Subdivision

The line is entirely double-tracked including bridges, and features extensive sidings.

[1] Originally built as a more direct route to the San Francisco Bay to compete with the Western Pacific Railroad, the Cal-P segment opened months prior to the First transcontinental railroad.

The present double-track lift bridge across the Carquinez Strait replaced the train ferry in 1930.

[2] The line hosts several Amtrak passenger routes: the Capitol Corridor, San Joaquins, Coast Starlight, and California Zephyr operate 36 trains daily over the Benicia–Martinez Bridge.

Union Pacific operates numerous freight trains over the route, and BNSF has trackage rights in some segments.

California Zephyr crossing the Benicia–Martinez Bridge over the Carquinez Strait , May 2019
A Union Pacific freight train passes through Fairfield–Vacaville Amtrak station , May 2019