State Route 37

MTC and its partners are working to make state Route 37 more resilient against chronic traffic congestion, flooding and sea level rise, in order to preserve vital connections between jobs and homes.

State Route 37 (SR 37) runs along the northern shore of San Pablo Bay, linking US 101 in Novato with Interstate 80 in Vallejo. This 21-mile corridor connects Solano County cities and some of the most affordable housing in the Bay Area with jobs in Napa, Marin and Sonoma counties. It also serves as a vital connection between Marin, Sonoma, Solano and Contra Costa and the Central Valley.

The low-lying corridor experiences a number of challenges, including chronic traffic congestion, vulnerability to flooding that will increase with sea level rise, and potential impacts on highly sensitive wetlands.

Making SR 37 More Resilient

MTC and its partners are working on the development of corridor improvements to make this critical regional transportation corridor higher, safer, greener and built to last.

    Near-term flood reductions include:

    • Raised pavement elevation
    • Flood walls, drainage, culverts and slide gates
    • Bladders and portable pumps

    Interim solutions to:

    • Improve traffic flow and peak travel times
    • Provide equitable transportation for underserved communities
    • Include a high-occupancy vehicle (HOV) lane and encourage public transit

    Ultimate improvements will:

    • Adapt SR 37 to sea level rise
    • Create ecological resilience in the surrounding environment
    • Enhance public access
    • Provide safe mobility for bicycles and pedestrians

    Public Meetings

    April 24, 2023 Meeting Recording

    The latest project updates were presented.

    View the 4/24/23 video and meeting materials.
    September 14, 2022 Meeting Recording

    Caltrans shared the results of its evaluation of alternatives for the future of Highway 37

    Watch the 9/14/22 video.
    February 2, 2022 Meeting Recording

    SR 37 Sears Point to Mare Island Improvement Project

    Watch the 2/2/22 video.
    Sonoma County Transportation Authority

    See what MTC and its partners are planning for SR 37. Participate in meetings and events to share your views.

    Learn more at scta.ca.gov.
    Segment of the State Route 37 project map.
    Caltrans Corridor Projects

    Caltrans’ SR 37 project maps, background, meetings and more.

    Learn more at dot.ca.gov.
    State Route 37 project logo - "Resilient 37."

    Improvements to State Route 37 are a partnership of The Metropolitan Transportation Commission, the California Department of Transportation, Solano Transportation Authority, Sonoma County Transportation Authority, Transportation Authority of Marin and Napa Valley Transportation Authority.