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

9 Documents in Project


SCH Number
Lead Agency
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
FON - FONSI - Findings of No Significant Impact
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
Agency Name
Department of Transportation, District 4
Contact Types
Lead/Public Agency


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

Notice of Completion

Development Types
Transportation:Other (Highway Improvements)
Project Issues
Agriculture and Forestry Resources, Air Quality, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Transportation, Vegetation, Wetland/Riparian, Wildlife

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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