Caltrans Paving Schedule for State Route 12 in the City of Sonoma

Posted on September 27, 2021

Caltrans project map

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The following is a Traffic Advisory from Caltrans

Caltrans will begin paving a 3.8-mile section of State Route 12 through the city of Sonoma from October 1 through October 30, 2021. Preparatory work for the paving begins Wednesday, September 22, 2021.

Work will occur on Route 12 between Leveroni Road and Boyes Boulevard. In the City of Sonoma, Route 12 is also known as Broadway and W. Napa Street. Preparatory work includes digging out area of failed, broken pavement and restoring it. To prevent traffic congestion, all work will be done at night.

Wednesday, September 22 – Friday, October 1
Digouts: Digging out and restoring areas where the pavement has failed on Route 12 between Levoroni Road and Boyes Boulevard.

Monday, October 4 – Saturday, October 30
Working in sections, Caltrans will grind away the old asphalt and add a fresh layer of asphalt in its place between  Leveroni Road and Boyes Boulevard.

After paving is complete, Caltrans will begin striping the highway and adding loop detectors, wire loops in the pavement that detect vehicles waiting at traffic signals.

For more information on the project including maps and images go to the Caltrans website.

For 24/7 traffic updates, go to You can also get real-time information on all State Highways in California on our Caltrans Quick Map: Please be #WorkZoneAlert Or follow Caltrans on Twitter at

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