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Construction crews are closing lanes on both freeways in the Tri-Valley as part of overnight pavement rehabilitation projects that started this week.
Nightly grinding work is occurring for roughly two months on Interstate 580 between Pleasanton and Castro Valley, while a two-year resurfacing project on Interstate 680 through San Ramon into Danville also began on Monday, according to Caltrans.
“We appreciate the public’s patience and cooperation as crews work to improve our roadways,” the state agency said in a press release on the northern project.
The work west from Pleasanton is part of a larger pavement rehabilitation, with multiple lane closures scheduled to allow for key grinding along the 11-mile stretch on both sides of the freeway during the workweek.
“This grinding work is necessary to smooth the existing pavement profile and remove surface irregularities,” Caltrans stated. “The project continues to address safety concerns, improve ride quality, and extend the service life of the corridor.”
Up to three lanes could be closed nightly, although crews will aim to maintain two open lanes on each side whenever possible, according to Caltrans. Work hours are 8 p.m. to 4 a.m. on westbound I-580 and 10 p.m. to 6 a.m. eastbound on Monday through Friday nights.
“Eastbound grinding operations will begin near the I‑580/SR‑238 Interchange, while westbound grinding operations will begin near the I‑680/I‑580 Interchange. Crews will work toward the opposite ends of the corridor as operations progress,” the agency said.
Meanwhile on I-680, crews will be closing some northbound and southbound lanes each weeknight from 8 p.m. to 5 a.m. between Alcosta Boulevard in San Ramon and the Diablo Road undercrossing in Danville – a 7.7-mile project expected to last until spring 2028.
“Key activities include replacing damaged concrete slabs, grinding and resurfacing pavement, and performing roadway and infrastructure upgrades to meet current standards,” Caltrans stated. “These improvements will enhance the overall driving experience and ensure the long-term durability of the roadway.”
“Work includes: Saw-cutting pavement, replacing individual slabs, pavement grinding, asphalt placement, and other roadway rehabilitation tasks at various locations,” officials added. “During these hours, lanes, ramps, and connectors may be closed. Motorists should follow posted detour signs and plan for extra travel time.”
Follow closures in real time at http://quickmap.dot.ca.gov/.
