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I-80 Solano Ramp Metering

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Latest News

  • 9/28/15 - Interstate 80-Vallejo, Vacaville, and Fairfield Ramp Meters to be activated September 28

  • The Project

    This project is one of three contracts split from the baseline Proposition 1B Corridor Mobility Improvement Account (CMIA) project – HOV Lanes, Fairfield. This project will construct traffic monitoring stations and ramp metering improvements on mainline, ramps, and connectors along I-80, from Red Top Road in Cordelia to Putah Canal in Fairfield, in Solano County.

    The Need

    I-80 is vital to interregional and regional commuting, freight movement, and recreational travel. It connects the Bay Area to Sacramento, connects Interstate 5 to the north via Interstate 505, and links the San Francisco Bay Area to the East Coast. Recent growth in Solano County has significantly increased transportation demand on the highway, necessitating the addition of an HOV lane.


    The project’s improvements will reduce travel delay, decrease congestion, and improve mobility in the corridor.


    The project is developed through a partnership among the Solano Transportation Authority (STA), the Metropolitan Transportation Commission (MTC), and the California Department of Transportation (Caltrans).


    The I-80 Ramp Metering Improvement Project will improve traffic operations and reduce travel delay in the corridor.