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I-680 Paving Project

Current Traffic Advisories

Partial Closures of Southbound I-680 between Alcosta Boulevard in San Ramon and I-580/I-680 Connector in Pleasanton October 4–7, 2024

(In Case of Rain, Closure Will be Rescheduled)

Map location of partial lane closures of Southbound Interstate 680 between Alcosta Boulevard in San Ramon and I-580/I-680 Connector in Pleasanton.

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 4 through Monday morning, October 7.

Two left 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 4 through 4 a.m. Monday morning, October 7.

Two right 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.

In addition to partial closure 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.

After this partial closure, there will be one more partial weekend closure (Not Full Closure) of southbound I-680 in this specific location allowing that motorists can still travel on southbound I-680 through the construction work zone. The date for this additional partial weekend closure is scheduled for 10/18/2024 to 10/21/2024.

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. Lane Closure Locations (Not Full Closure):
    1. Two 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

Map location and detours for partial lane closures of Southbound Interstate 680 between Alcosta Boulevard in San Ramon and I-580/I-680 Connector in Pleasanton.

Map location of on and off-ramps of partial lane closures of Southbound Interstate 680 between Alcosta Boulevard in San Ramon and I-580/I-680 Connector in Pleasanton.

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

 

Project Media Gallery

Additional project resources including downloadable maps, image galleries, and video clips can be found on the media resources page.

Caltrans Repaving Northbound Interstate 680 Between Sunol and San Ramon

Caltrans is embarking upon a major improvement project that will repave northbound Interstate 680 and replace entire sections of the roadway to enhance safety and provide a smoother ride to motorists.

The project will take place on I-680 between Koopman Road in Sunol and Alcosta Boulevard in San Ramon.

Map showing the full project area for the Interstate 680 Repaving Project between Koopman Road in Sunol and Acosta Boulevard in San Ramon.

Caltrans will need to close freeway lanes and entire sections of the freeway to do the work. The work began in December 2022, starting in the Sunol area and working northward.

The first part of the project is located in the City of Sunol.

To perform this work, Caltrans has scheduled to close northbound Interstate 680 overnight from the I-680/State Route 84 junction to the Sunol Boulevard exit starting in December 2022 and anticipated to complete in April 2023.

All work is weather-dependent.

Caltrans is aware that the closures will impact the motoring public and every step is being taken to minimize inconvenience.

California Highway Patrol officers and message signs will be on hand to guide motorists.

Caltrans thanks the motoring public in advance for your patience as we work to improve I-680.

Traffic Advisories

Video Advisory

Project Contact:

Janis Mara
Email: Janis.Mara@dot.ca.gov