Transportation and Public Works
Map showing roads adopted by organizations, corporations, groups and individuals who voluntarily maintain and enhance Sonoma County's roadsides.
Sonoma County roads symbolized by Functional Classification, as designated by the State of California.
Bridges, culverts, storm drains, and various other structures found on Sonoma County roads.
Sonoma County Road Categories, as designated by the Sonoma County Board of Supervisors in conjunction with the Department of Transportation & Public Works.
Displays storm water destination, and related drainage features, such as streams, open channels, storm drain systems, and culverts.
Parking-restricted areas on County-Maintained roads. Features include No Parking Zones, Tow Away Zones, Disabled Parking Zones, Loading Zones, and various other types of parking-restricted areas.
Pavement condition on Sonoma County roads, as indicated by periodic inspection ratings.
Pavement cuts, by a utility company or any other party, are prohibited on any road that has been repaved within the last five (5) calendar years.
Paving and other road surfacing treatment projects done on Sonoma County roads.
Paving and other road surfacing treatment projects planned during the 2020-2021 fiscal years for Sonoma County roads.
Displays significant locations along County-maintained roads that have been assigned a postmile. Features include bridges, intersections, culverts, and changes in jurisdiction.
County-maintained roads symbolized by their road maintenance facility designation. NOTE: Roads that are within city limits, state highways, or private property do not belong to the County-maintained road system.
Speed limits and speed surveys on Sonoma County roads.
Traffic Lighting and Street Lighting for County of Sonoma - street lights, flashing beacons, speed radar feedback signs, etc.
Traffic volume on Sonoma County roads. Features include vehicle counts, taken at point locations, and average volume along linear street sections, derived from vehicle counts.
Vehicle (length, height, weight) restrictions on county-maintained roads, parking restrictions and seasonally closed roads at summer crossing bridges.