Highway 4 Corridor (State Route 4) | 511 Contra Costa

Highway 4 Corridor (State Route 4)


Spanning almost the entire width of Contra Costa County, California State Route 4 is an east–west highway which begins in Hercules and ends in Antioch. The road is an expressway from Hercules until it approaches Martinez, at which point it becomes a full freeway – the California Delta Highway. Tracks for Bay Area Rapid Transit run in the median of the freeway from Concord to Antioch.

Incentives for Contra Costa Commuters

Tired of sitting in traffic? 511 Contra Costa offers a variety of incentives to try a different commute. Switch from driving alone to another type of commute, like carpooling or taking transit, at least one day a week and you can apply for the Drive Less Incentive. Choose from a $25 gift card or having 25 trees planted in your name.

And you don’t have to worry about getting stranded at work with our free Guaranteed Ride Home program. Any day you skip the solo drive to work, you can get a free ride home in case an emergency or unexpected events change your travel plans.

Current Status

For current highway information along State Route 4, visit the Caltrans Road Information page and enter “4” where it asks for the highway number. For visual traffic congestion information, you can also click “VIew larger map” on the Google map below, click “Layers”, and then select “Traffic”.

Highway 4 News