Welcome to the Napa County Roads Division. We are committed to maintaining and preserving the Napa County road system so that it is safe, reliable and accessible for all users. The Roads division is responsible for maintaining approximately 450 miles of public roads, 79 bridges and 50 major drainage structures within the unincorporated area of the County. The division is active in other road-related safety efforts such as vegetation management and maintenance of structure, drainage facilities, guardrails, traffic signs, signals and pavement markings. We invite you to visit our links page for useful road and safety links.
Napa County Public Works is preparing to construct a replacement of the bridge on Oakville Crossroad at the Napa River, which was closed to all traffic following the May 21, 2015 earthquake.
Napa County Public Works is preparing to construct a replacement of the major culvert on Greenwood Avenue at the Napa River, which was closed to all traffic following the storms of December, 2014.
All new development, or improvements to existing development that will generate additional traffic, in the Airport Industrial Area are subject to a Traffic Mitigation Fee.