Public WorksRoads



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.


Traffic Mitigation Fees

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


Trancas Street/Milliken Creek Stone Bridge

Learn more about the County's plans for this bridge which was damaged in a collision May 5, 2014.  Please visit the Trancas Milliken Stone Bridge page for more information.


Devlin Road Extension

Construction of Devlin Road south of Airport Boulevard is COMPLETE!  Please visit the Devlin Road Extension for more information.


Road and Bridge Projects 2014-2018


Chip Seal 1 Chip Seal 2 Chip Seal 3