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.
Special Events on County Roads
More information about these events, which include marathons, bicycling events, triathlons and more -- including application information and how to submit concerns to County staff.
New Development - Traffic Impacts
Traffic Impact Studies
Requirements for preparation of traffic impact studies
Evaluation of cumulative impacts
Traffic Mitigation Fees -- Napa Valley Business Park
All new development, or improvements to existing development that will generate additional traffic, in the Napa Valley Business Park (area surrounding Napa County Airport) are subject to a Traffic Mitigation Fee.
For projects which include underground excavation, information about Underground Service Alert (USA) requirements.
Partnering for Safety
The County has partnered with Cal Fire and various fire safe
councils to remove and reduce the fire fuel load along our roadways. County crews provide traffic control,
equipment and some tools. Cal Fire
supplies an inmate crew with tools, and the Fire Safe Councils handle public
outreach, coordination with landowners and identifying priority areas.
Removing and reducing vegetation along roadsides improves
both fire safety and traffic safety, and is the biggest part of the Roads
budget. This partnership helps get much
more work done for much less cost.
Videographer/drone operator Evan Kilkus filmed this partnership work in progress along Lake Berryessa Road in March, 2015, and has
made this video footage available to the County. The music has been provided courtesy of local
musician Bill Scholer.