Highway 101 Widening and Improvements Project-Old Redwood Highway to Rohnert Park Expressway

Highway 101 Widening and Improvements Project-Old Redwood Highway to Rohnert Park Expressway

The project extends along Highway 101 in Sonoma County between Old Redwood Highway in Petaluma and the Rohnert Park Expressway in Rohnert Park, a distance of 10.3 km (6.4mi). The following improvements are proposed within the project limits. Widening in the median to provide high occupany vehicle (HOV) lanes in each direction; widening along the outside to provide auxiliary lanes a required to facilitate weaving traffice movements between the State Route (SR) 116-Gravenstein Highway and Rohnert Park /Expressway interchanges; shifting the alingment of a portion of Redwood Drive if analysist determines auxiliary lanes are needed; reconfiguration of the northbound SR 116 to Highway 101 entrance ramp to improve safety; modified ramp geometry at the Old Redwood Highway interchange; modified freeway on-ramps to accommodate future ramp metering and HOV preferential lanes; northbound climbing lane over the Cotati Grade to improve safety, improve operations and facilitate truck movements; modifications or Railroad Avenue to provide a full or partial interchange (optional component); and modifications of structures and use of retaining walls as necessary to accommodate highway improvements.

Cotati, Petaluma, Rohnert Park

Sonoma

Air Resources Board, Transportation Projects, California Department of Conservation (DOC), 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, San Francisco Bay Region 2 (RWQCB), Department of Toxic Substances Control, Department of Water Resources, Office of Emergency Services, California, Resources Agency

Transportation:Other (Highway Widening/Improvements)

Transportation