Sonoma 121 Safety Improvements Project

Sonoma 121 Safety Improvements Project

The purpose of this Safety project is to reduce occurrences of cross-centerline collisions. The project is divided in 3 segments. Segments 1 and 3 both have drainage work, and segment 3 is proposed to have the MBGR upgraded to MGS. For segment 2, there are two proposed alternatives for roadway realignment. For alternative 1, the proposed alignment would shift slightly towards the eastern side of SR 121 and there would be two retaining walls on the eastern sie and a two-way left turn lane after the entrance to a winery business. For alternative 2, the horizontal curve will be straightened towards the western side of SR 121, and then realigned to the eastern side of the highway; two retaining walls are proposed, one on the eastern side and one on the western side of SR 121. Segments 1 and 3 are identical in both build alternatives.

Sonoma

Air Resources Board, Transportation Projects, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, North Coast Region 1 (RWQCB), Caltrans, Division of Aeronautics, Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Division of Water Rights

Transportation:Local Road (Roadway safety improvements)

Aesthetics, Agriculture and Forestry Resources, Biological Resources, Cultural Resources, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Transportation, Vegetation, Wetland/Riparian