I-680 Loop Detectors Replacement Project (EA 3X170)

Caltrans District 4 is initiating the I-680 Loop Detectors Replacement Project (EA 3X170) to replace loop detectors at seven locations in Contra Costa County, specifically on Interstate 680 from post mile 13.68 to 18.70. The scope of work involves using trench ground saws to cut pavement for the installation of inductive loops and utilizing existing electrical cabinets for connectivity. Construction is projected to begin in September 2026, with all activities and equipment staging required to remain within the Caltrans right of way in areas without vegetation. The project will utilize asphalt concrete grinding and trenching rigs, trucks, sweepers, and hand tools. Under NAICS code 237310, the project is classified as a forecast and has been granted a Notice of Exemption under PRC 21084 and 14 CCR 15301 Class 1(d), as it involves existing facilities and is not expected to cause environmental impacts. The project is managed by the Caltrans District 4 Office of Maintenance Environmental in Oakland, California.