Partial Closures of Southbound I-680 between Alcosta Boulevard in San Ramon and I-580/I-680 Connector in Pleasanton May 17-20 and May 31-June 3, 2024

Published: May 02, 2024

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, May 17 through Monday morning, May 20, and Friday, May 31 through Monday, June 3.

In both closures, three left lanes of southbound Interstate 680 will be closed between Alcosta Boulevard in San Ramon and the I-580/I-680 Connectorin Pleasantonfrom 9 p.m. Friday through 4 a.m. Monday morning.

Two right lanes of I-680 will remain open during both closures. 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.

In addition to these closures on southbound I-680, the far-left lane (Express Lane) and left shoulder will be closed on northbound I-680 between Amador Valley Boulevard in Dublin and Alcosta Blvd in San Ramon.

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.
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. Southbound Saint Patrick Way onramp onto southbound I-680
6. Lane Closure Locations (Not Full Closure):
   1. Three left lanes closed on southbound I-680 between Alcosta Blvd in San Ramon and I-580/I-680 connector in Dublin
   2. Far left lane (Express Lane) and left shoulder closed on northbound I-680 between Amador Valley Blvd in Dublin and Alcosta Blvd in San Ramon

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

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