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
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."

The Resilient SR-37 Partnership agencies include:

  • MTC
  • The California Department of Transportation
  • The Transportation Authority of Marin
  • Napa Valley Transportation Authority
  • Solano Transportation Authority
  • Sonoma County Transportation Authority
  • Sonoma Marin Area Rail Transit District (SMART)

The Partnership agencies work closely with colleagues from:

  • U.S. Army Corps of Engineers
  • U.S. Fish and Wildlife Service
  • U.S. Environmental Protection Agency
  • National Oceanic and Atmospheric Administration
  • California Natural Resource Agency
  • California Department of Fish and Wildlife
  • San Francisco Bay Regional Water Quality Board
  • San Francisco Bay Conservation and Development Commission
  • Federated Indians of Graton Rancheria
  • Yocha Dehe Wintun Nation
Past Public Meetings

April 24, 2023 Meeting

September 14, 2022 Meeting

  • 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