Sonoma State Route 12 Shoulder Widening

The California Department of Transportation, specifically District 4 - Bay Area/Oakland, is planning a safety improvement project on Sonoma State Route 12 between post mile 28.10 in Glen Ellen and post mile 31.67 near Kenwood. The project aims to enhance road safety by widening the shoulders along this stretch and installing centerline and edge-line rumble strips to reduce the risk of run-off-road crashes. In addition to these enhancements, the project includes replacing two existing culverts located at post mile 28.23 and post mile 28.34, as well as constructing a new drainage ditch on the westbound side to improve water management and road stability. Caltrans is the lead agency responsible for this initiative under the California Environmental Quality Act, ensuring environmental considerations are properly addressed throughout planning and implementation. The project is publicly listed as a forecast with a posted date of June 26, 2026, and is tied to the location in Glen Ellen, California, with a zip code of 95442. Primary contact for inquiries is Christopher Pincetich, Branch Chief, who can be reached via email at christopher.pincetich@dot.ca.gov or by phone at 408-590-4167. Further details can be accessed through the official CEQA notice link provided. While no solicitation number or contracting specifics are currently available, the project signals an upcoming procurement under Caltrans’ infrastructure improvement agenda, targeting increased roadway safety and drainage reliability in Sonoma County.