State Route (SR) 242 / Clayton Road Ramps Project

4 Documents in Project


SCH Number
Lead Agency
Caltrans 4 (Oakland) (California Department of Transportation, District 4)
Document Title
State Route (SR) 242 / Clayton Road Ramps Project
Document Type
NEG - Negative Declaration

Document Description
The SR 242/Clayton Rd Ramps project would modify the existing partial interchanges at Clayton Rd and Concord Ave. The SR 242/Clayton Rd interchange would be reconfigured from a partial interchange to provide new northbound and southbound SR 242 on and off ramps. Proposed local roadway improvements include a combination of additional travel lanes and the extension of left turn pockets on Willow Pass Rd, Concord Ave, Franquette Ave, Clayton Rd, Market St, and Commerce Ave. The purpose of the project is to reduce congestion and improve traffic operations at the SR 242/Clayton Rd and SR 242/Concord Ave interchanges, thereby enhancing mobility in the area, and improving accessibility to key local destination including the Concord CBD and the Concord BART station.

Contact Information
Melissa Coppola
California Department of Transportation, District 4
111 Grand Avenue
Oakland, CA 94623-0060

(510) 286-4736


Contra Costa
Cross Streets
SR 242 / Concord Ave
State Highways
4, SR 242, I 680
Buchanan Field
Mt. Diablo HS
Walnut Creek, Pine Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Other (interchange improvement)
Project Issues
Cumulative Effects Wetland/Riparian Water Quality Vegetation Traffic/Circulation Toxic/Hazardous Soil Erosion/Compaction/Grading Recreation/Parks Public Services Noise Geologic/Seismic Flood Plain/Flooding Biological Resources Archaeologic-Historic Air Quality Aesthetic/Visual
Reviewing Agencies
California Department of Parks and Recreation California Highway Patrol Caltrans, Division of Aeronautics Department of Fish and Wildlife, Region 3 Department of Water Resources Native American Heritage Commission Regional Water Quality Control Board, Region 2 Resources Agency
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