The Solano Transportation Authority (STA), in partnership with the City of Vallejo, Caltrans, and Solano County, is leading construction on the State Route 37/Fairgrounds Drive Interchange Improvements Project. This project will include roadway improvements along portions of Fairgrounds Drive and Redwood Parkway/Redwood Street, as well as several nearby intersections and interchanges within the City of Vallejo. Specifically, this project will widen and improve 1.5 miles of Fairgrounds Drive, extending from the State Route 37 interchange to the Redwood Parkway/Interstate 80 Interchange. The project will implement a Diverging Diamond Interchange design that will significantly improve traffic flow and safety, while reducing congestion and greenhouse gas emissions. At the end of the project, it will be both safer and easier for motorists, pedestrians, and cyclists to access and navigate.

The project supports Solano 360, a larger county wide economic development to revitalize the area and encourage economic growth and development. This includes a mobility hub at the Fairgrounds site, which is funded by One Bay Area Grant Cycle 3OBAG-3 and various grants provided by the STA to the County, who is the project sponsor. Improvements will also be made to a number of intersections and interchanges, including Redwood Street/Parkway and Interstate 80, Fairgrounds Drive and State Route 37. This project will relieve congestion and improve traffic flow on local streets, improve the existing interchange and intersection operations, improve the safety of local streets, and increase capacity of the local roadway network to support future growth. See the Updates tab for related Project Documents.