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Current Construction Projects 

Road Closures & Delays

For a complete listing of road closures and restrictions in Sonoma County, please visit roadconditions.sonoma-county.org.

Road Closure (28x27)Closed or Restricted Access 
Road Advisory (28x27)Current Delay or Other Advisory
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  • 2147497245 2019 Pavement Preservation Program - Chip, Fog and Slurry Seals (M19500) false false false 1 Project Description This project includes road surface treatments of various county roadways using Chip Seal, Fog Seal, and Slurry Seal, as described bel

  • This project includes pavement resurfacing of various county roadways using Full Depth Reclamation, Asphalt Concrete Overlays, and Remove and Replace.

  • The existing bridge that carries Chalk Hill Road over Maacama Creek is a one-lane structure built in 1915. It is a County landmark and is eligible for inclusion on the National Register of Historic Places. The existing bridge has deteriorated significantly and is vulnerable to earthquakes as well as foundation scour and erosion along the south creekbank. The bridge has been determined to be unstable in an earthquake, and is threatened by erosion. The County seeks to replace the bridge with a new two-lane bridge. 

  • The project is located on Highway 101 at Airport Boulevard in Sonoma County between the cities of Santa Rosa and Windsor near the Sonoma County Airport. The project proposes to construct landscape improvements through an encroachment permit issued by Caltrans as a follow up to the Highway 101 North/Airport Boulevard interchange and sound walls project.
  • The project site is located on Lakeville Road, Petaluma, California between State Route 37 and State Route 116

  • The County is actively working to engage the community regarding a new bridge that reflects local preferences, meets modern constructions standards, and protects the natural beauty of the region.
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Contact Information

Johannes J. Hoevertsz


Transportation & Public Works
Business Hours
Monday – Friday
8:00 AM – 5:00 PM
Contact us by Phone
Office Location
La Plaza B
2300 County Center Drive
Suite B 100
Santa Rosa, CA 95403
38.462006, -122.725384

Road Paving Projects

Sonoma County Pavement Preservation Program


See information about road paving projects in unincorporated Sonoma County.

Measure M

See information about the Measure M Sales Tax


Read more about the Traffic Relief Act, passed by Sonoma County voters in 2004.

Standard Plans

Construction Standards for County Roads


Standard plans for construction of roads and related structures.