I-80 / Gilman Interchange In Berkeley, CA

The project proposes to improve vehicle, pedestrian, and bicycle operations at the Interstate 80 (I-80) / Gilman Street interchange in northwest Berkeley.  The existing intersection controls, roadway geometry, and the high volumes of local and regional traffic on Gilman Street result in poor traffic operation and non-motorized access at and near the interchange. The proposed interchange project seeks to:

• Simplify and improve navigation and traffic operations on Gilman Street between the West Frontage Road and 2nd Street through the I-80 interchange so that congestion is reduced, queues are shortened, and merging and turning conflicts are minimized;
• Improve mobility in the Gilman Street corridor;
• Improve safety at Gilman Street intersections;
• Improve access for the bikes/pedestrians traveling between the Bay Trail and Northern Berkeley;
• Create a Gateway into North Berkeley.
Proposed project components include reconfiguration of I-80 ramps and ramp intersections, and reconstruction of Gilman Street from north of West Frontage Road to south of 2nd Street. There is no freeway mainline improvement identified for the project. Currently, three build alternatives are being studied. Each build alternative provides at-grade pedestrian and bicycle improvements to enhance pedestrian connections and promote regional bicycle network continuity. 

Links:

 Current Project Webpage

 Prior Studies:
 
    • I-80 Gilman PSR-PDS_Final_Signed
    • Attachment E - I-80 Gilman Revised PEAR_Final_Signed
    • Attachment H - I-80 Gilman_SWDR-LongForm-Signed

Sponsor: Alameda County Congestion Management Agency
Primary Stakeholders: California Department of Transportation and City of Berkeley