Contact Information
Office Location
La Plaza B
2300 County Center Drive
Suite B 100
38.462023, -122.725381
Roadway Utility Cuts
See guidelines and restrictions for making utility cuts on Sonoma County roads.
Information Resources
Road-Related Information and Downloadable Resources
Construction Standards
View and download standard plans for new construction on County roads.
Traffic Surveys
See traffic counts and speed surveys taken on Sonoma County roads.
Postmiles
Download the Postmile Book, a detailed listing of significant locations along County roads.
Road Jurisdictions
State, county, city or private? Find out which agencies are responsible for which roads.
Measure M
See listing of current and completed projects funded by Measure M.
About Measure M
Read about the Traffic Relief Act, passed by Sonoma County voters in 2004.