Caltrans Finalizes I-505 Vaca Valley Road Upgrades
Published Date: 9/11/2026
Notice
Summary
The FHWA, on behalf of the California Department of Transportation (Caltrans), is issuing this notice to announce actions taken by Caltrans that are final agency actions. These actions relate to the proposed Interstate 505 Vaca Valley Parkway Corridor Multimodal Improvement Project in Solano County, California. Caltrans in partnership with the City of Vacaville is proposing to provide interchange and local roadway improvements along Interstate 505 at the Vaca Valley Parkway on and off ramps. The Project would replace three intersections with roundabouts and introduce new bicycle and pedestrian connections across the corridor to help improve traffic, pedestrian and bicycle operations.
Analyzed Economic Effects
2 provisions identified: 1 benefits, 1 costs, 0 mixed.
I-505 Roundabouts and Bike/Ped Connections
Caltrans and the City of Vacaville will replace three intersections with roundabouts and add new bicycle and pedestrian connections along Interstate 505 at Vaca Valley Parkway between postmiles R1.2 and R1.7. The Environmental Assessment with a Finding of No Significant Impact for the project was approved on March 12, 2026, and the project is intended to help improve traffic, pedestrian, and bicycle operations.
Deadline to Challenge Project Decisions
If you want to file a legal claim challenging the federal approvals for the I-505 Vaca Valley Parkway Corridor project, your claim must be filed on or before February 8, 2027, or it will be barred. If a federal law authorizing judicial review sets a time period of less than 150 days, that shorter period applies instead.
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Key Dates
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