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Officials gathered April 26 to formally break ground on what will be the final segment of high-occupancy vehicle/toll lanes that will stretch from the Carquinez Strait in Contra Costa County to the Santa Clara County line on southbound Interstate 680. The ceremony took place 13 years after the first segment of express lane opened over the Sunol Grade. The nine-mile, $326 million project is scheduled for completion in late 2026.
Caltrans deputy director Doanh Nguygen joined Alameda County Supervisor David Haubert, Dublin Mayor Melissa Hernandez and Pleasanton City Councilwoman Valerie Arkin to turn the shovels.
Significantly, Caltrans combined the project with the replacement of the pavement on that same section of southbound lanes, alleviating the need for another construction project. Caltrans and contractors currently are replacing the northbound pavement from Sunol to Alcosta Boulevard and adding the HOV lanes. The target completion date is the summer of 2025.
The interchange upgrades to Highway 84/I-680 in Sunol is scheduled for completion in spring 2025 — weather can be a factor in all three completion dates.
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