I-680 Corridor Improvements in Alameda County

The California Department of Transportation (Caltrans) and the Alameda County Transportation Commission (Alameda CTC) will begin construction on several projects on I-680 in Alameda County in the cities of Fremont and Pleasanton and town of Sunol. These projects will alleviate traffic congestion and delays, improve safety and operations, provide for more efficient movement of commuter traffic and trucked goods along the I-680 corridor and extend the service life of the pavement and improve ride quality. The projects include the addition of approximately 9 miles of continuous access High Occupancy Vehicle Lane (HOV)/Express Lane in the northbound direction between Grimmer Boulevard and Route 84 and conversion of the existing southbound HOV/Express Lane from buffer separation to continuous access between Route 84 and Route 262 (Mission Boulevard). Construction also includes an auxiliary lane between Washington Boulevard on-ramp to Route 238 (Mission Boulevard) off-ramp, roadway and bridge widening, retaining walls, 12 miles of pavement rehabilitation in the northbound direction from Scott Creek Road to north of Route 84 and completion of ramp metering and traffic monitoring facilities along the I-680 corridor.

What to Expect

Motorists may encounter intermittent lane/ramp closures, temporary detours, and increased heavy construction equipment during the day time and night time hours. Advanced notification regarding lane/ramp closures and detours will be provided as they become available. All work is weather permitting.

More Information

Project Website: Alameda CTC Project page
Project Contact: Marcus Wagner
Public Information Officer
Phone: (510) 622-8758
Caltrans District 4
111 Grand Ave.
Oakland, CA 94612