Partial Closures of Southbound I 680 between Alcosta Boulevard in San Ramon and I 580/I 680 Connector in Pleasanton October 18–21, 2024

Published: Oct 15, 2024

(In Case of Rain, Closure Will be Rescheduled)

San Ramon / Alameda County - Caltrans has scheduled a partial closure of southbound Interstate 680 between Alcosta Boulevard in San Ramon and the I-580/I-680 connector in Pleasanton Friday, October 18 through Monday morning, October 21.

Three right lanes of southbound Interstate 680 will be closed between Alcosta Boulevard in San Ramon and the I-580/I-680 Connector in Pleasanton from 9 p.m. Friday, October 18 through 4 a.m. Monday morning, October 21.

Two left lanes of I-680 will remain open during this closure. However, we encourage motorists to take alternative routes to alleviate traffic congestion within the construction work zone on southbound I-680 in the cities of San Ramon and Dublin.

Though lanes will be open, it's best to avoid the area if possible. If you do access the freeway, **Please be aware of construction vehicles entering and exiting the construction zone and slow for the Cone Zone.**

During the closures, the contractor will replace a portion of the existing deteriorated roadway with new pavement on southbound I-680.

The work will repair deteriorating existing pavement and enhance motorist safety while reducing the number of nightly closures needed on the project. Each weekend closure will accomplish the amount of work that otherwise would require an estimated 40 nighttime closures.

In the case of rain or unanticipated developments, the closures will be rescheduled, and the public will be notified.

Portable changeable message signs will be placed prior to closure advising motorists of this closure and will remain in effect throughout the weekend while work is being performed.

Northbound I-680 and I-580/I-680 interchange connector will remain open and will not be affected by the closure.

Caltrans is aware that the closures will impact the motoring public and measures are being taken to minimize inconvenience. Caltrans thanks the motoring public in advance for your patience as we work to improve I-680.

California Highway Patrol officers and message signs will be on hand to guide motorists. Detours for the closures are as follows:

1. Motorists driving west on Interstate 80 in Vacaville and Fairfield will remain on I-80 to southbound I-880.
2. Motorists on southbound I-680 near the Benicia Bridge can take I-780 west to I-80 to southbound I-880.
3. Motorists on southbound I-680 in Concord can take SR-4 to I-80 to southbound I-880 or SR-24 to I-80 to southbound I-880.
4. Motorists on southbound I-680 in Walnut Creek can take SR-24 to I-80 to southbound I-880.
5. Full Shutdown Locations:
   1. Alcosta Blvd. onramp onto southbound I-680
   2. Alcosta Blvd. offramp to San Ramon Valley Blvd.
   3. San Ramon Valley Blvd. onramp onto southbound I-680
6. Lane Closure Locations (Not Full Closure):
   1. Three right lanes closed of southbound I-680 between Alcosta Blvd in San Ramon and I-580/I-680 connector in Dublin

For more information, please visit the Alameda County Transportation Commission website at https://bit.ly/43dKwg1.

For 24/7 traffic updates, please visit 511.org: https://x.com/511SFBay
For real-time information, visit Caltrans QuickMap: https://quickmap.dot.ca.gov
Or follow us on X: https://x.com/CaltransD4

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