Bridge Rehabilitation Project
Alameda County – Caltrans will close one direction of Interstate 680 (I-680) at the I-680 and Mission San Jose (SR-238) Separation/Overpass in Fremont for two weekends to perform critical bridge and pavement work. Segment of Southbound I-680 will close the weekend of July 25, 2025, and will close a segment of Northbound I-680 weekend of August 8, 2025.
These 55-hour closures are necessary to safely and efficiently complete key construction activities, including full bridge deck resurfacing and approach slab repairs. This phase of work involves heavy machinery and the resurfacing of the entire bridge deck. This work must be performed without live traffic to ensure worker and motorists safety. Concentrating these operations during weekend closures will help reduce the overall duration and impact of the project.
During these weekend closures, only one direction of travel on I-680 will be closed at a time with detours set in place. Motorists are encouraged to plan ahead and use alternative routes.
Weeknight work is already underway in preparation for these closures. Additionally, after the major bridge and overlay work is completed, additional work will continue during nighttime closures through Spring 2026, including pavement striping, barrier installation, and other finishing elements. Please note all work is weather dependent and scheduling dependent.
Caltrans thanks the public for their patience and cooperation as we continue to improve California's transportation network
SOUTHBOUND I-680 FULL HIGHWAY CLOSURE ON THE WEEKEND OF JULY 25, 2025:
Full closure on SB I-680 is scheduled on the weekend of July 25, 2025. A segment of SB I-680 will be closed and traffic will be detoured through the Mission Blvd/SR-238 Off Ramp towards the I-680 On Ramp. Closures will start Friday July 25 at 10:00 PM and conclude on the following Monday July 28 at 5:00 AM.
SB I-680 DETOUR: Motorists traveling southbound on I-680 will need to exit right onto Mission Blvd/SR-238 Off Ramp and continue straight onto SB I-680 On-Ramp.
NORTHBOUND I-680 FULL HIGHWAY CLOSURE ON THE WEEKEND OF AUGUST 8, 2025:
Full closure on NB I-680 is scheduled on the weekend of July 18, 2025. A segment of NB I-680 will be closed and traffic will be detoured through the Mission Blvd/SR-238 Off Ramp towards Eastbound SR-84. Closures will start Friday August 8 at 10:00 PM and conclude on the following Monday August 11 at 5:00 AM.
NB I-680 DETOUR:Motorists traveling northbound on I-680 will need to exit right onto Mission Blvd/SR-238 Off-Ramp; Left towards NB Mission Blvd/SR-238; Continue on Mission Blvd/SR-238; Make a right onto Niles Canyon Rd (SR-84) and continue; Right onto NB I-680/SR-84 On-Ramp; Merge and continue onto NB I-680 towards Sacramento.
If you have a question or want to share a concern about the project, please call the Project Hotline (510) 286-0319
Project Website: dot.ca.gov/680DeckRehab
For 24/7 traffic updates, please visit 511.org: https://x.com/511SFBay
For real-time information, please visit Caltrans QuickMap: http://quickmap.dot.ca.gov
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