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

9 Documents in Project


SCH Number
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
Highway 101 HOV Lane Widening and Improvements Project - Old Redwood Highway to Rohnert Park Expressway
Document Type
EIR - Draft EIR
Present Land Use
Transportation / Residential / Commercial

Document Description
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 (6.4 mi). The following improvements are proposed within the project limits: widening in the median to provide high occupany vehicle (HOV) lanes in each direction; standard outside shoulders; auxiliary lanes to facilitate weaving traffic movements between the SR-116 and Rohnert Park Expressway interchanges; ramp geometry modifications at the Old Redwood Highway interchange; northbound climbing lane over the Cotati Grade to improve safety and operations and facilitate truck movements; replacement of the Railroad Avenue undercrossing, modifications at the Highway 101/SR-116 interchange; widening of several bridge structures to accommodate the HOV widening; lengthening the cattlepass undercrossing south of Railroad Avenue; modification of the existing truck brake inspection area at the top of the Cotati Grade; and on-ramp improvements to accommodate future ramp metering, provide California Highway Patrol enforcement areas, and provide for HOV preferential lanes where minimum requirements are met.

Contact Information
Ray Akkawi
Department of Transportation, District 4
111 Grand Avenue
Oakland, CA 94612

Phone : (510) 286-4925


Cotati Petaluma Rohnert Park
Cross Streets
Old Redwood Highway, SR 116/Rohnert Park/Expressway
State Highways

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Other (Highway Improvements)
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Drainage/Absorption Economics/Jobs Flood Plain/Flooding Geologic/Seismic Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Wildlife Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
Air Resources Board, Transportation Projects California Department of Conservation California Department of Fish and Wildlife, Bay Delta Region 3 California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission California Regional Water Quality Control Board, North Coast Region 1 California Regional Water Quality Control Board, San Francisco Bay Region 2 California State Lands Commission Central Valley Flood Protection Board Department of Toxic Substances Control Department of Water Resources Resources Agency

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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