I-680 Controller Cabinet Upgrades (EA 2X960)

Caltrans District 4 is forecasting the I-680 Controller Cabinet Upgrades project (EA 2X960) in Contra Costa County, California. The scope of work involves upgrading seven controller cabinets located along I-680 between post mile R2.78 and 9.91, spanning from approximately 0.1 mile south of the Bolinger Canyon Road overcrossing to 0.46 mile south of the Stone Valley undercrossing. The project area encompasses parts of San Ramon, Danville, and Alamo. Construction is estimated to begin in September 2026. All project activities and equipment staging must remain within the Caltrans right of way, with staging specifically restricted to areas without vegetation. While some project elements will occur off the paved roadway, the work is classified as a Class 1 Existing Facilities categorical exemption under PRC 21084 and 14 CCR 15301, as no environmental impacts are anticipated. The project is managed by the Caltrans District 4 Office of Maintenance Environmental in Oakland, with Juliane Smith serving as the primary point of contact.