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Interstate 80-Solano Ramp Metering Project

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The California Department of Transportation (Caltrans) and its project partners, the Solano Transportation Authority (STA), the Solano Highways Partnership (SoHIP), and the Metropolitan Transportation Commission (MTC) are working together on improving operations on Interstate 80 in Fairfield, Dixon, Vacaville, and Vallejo.

The improvements include the installation and activation of ramp meters at various on-ramps.

I-80 Ramp Meter Locations
Caltrans and its project partners will activate ramp meters along I-80 in Solano County in three stages.

The first stage includes ramp meter activation in Fairfield on eastbound I-80 from Red Top Road to North Texas Street. Caltrans and its project partners are scheduled to activate I-80 ramp meters in Fairfield on February 18, 2014. Under typical congestion conditions, the meters will remain green Monday through Thursday, but will cycle red-green on Fridays (except February 18-21, when they will remain green).

The second stage includes ramp meter activation in Vacaville and Vallejo on eastbound and westbound I-80 between Redwood Street and the Interstate-505/I-80 interchange. These meters will be activated tentatively in 2015.

The third stage of ramp-meter activation phase includes meters at various locations in Dixon, Vacaville and Vallejo. These meters will be activated at a later date as funding becomes available.

What are Ramp Meters?
Ramp Meters are traffic signals on freeway onramps. They help improve the flow of traffic entering the freeway mainline. The improved flow also improves safety for motorists. Additional information included in our Frequently Asked Questions (FAQs) section.

Project Overview
As part of the I-80 Solano Ramp Metering Project, Caltrans and its project partners have widened ramps, installed metering lights, and begun connecting closed circuit TV cameras at approximately 60 sites along 25-miles of I-80 from Vallejo to Dixon.  

The project will benefit motorists by improving the flow and safety of vehicles entering I-80 in Solano County as well as motorists traveling on mainline I-80 throughout the corridor.  

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