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 May 17-20 and May 31-June 3, 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 Connector in Pleasanton from 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:

Motorists driving west on Interstate 80 in Vacaville and Fairfield will remain on I-80 to southbound I-880.
Motorists on southbound I-680 near the Benicia Bridge can take I-780 west to I-80 to southbound I-880.
Motorists on southbound I-680 in Concord can take SR-4 to I-80 to southbound I-880.
Motorists on southbound I-680 in Walnut Creek can take SR-24 to I-80 to southbound I-880.
Full Shutdown Locations:
1. Southbound Saint Patrick Way onramp onto southbound I-680
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

Map of the detour routes for partial closures of southbound I-680 between Alcosta Boulevard in San Ramon and i-580/I-680 connector in Pleasanton.

Map of the partial closure of southbound I-680 between Alcosta Boulevard in San Ramon and i-580/I-680 connector in Pleasanton.

Map of the partial closures of southbound I-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 is scheduled to begin in December, starting in the Sunol area and working northward, and will last about a year and a half.

Additionally, in 2023, work will necessitate closing I-680 for 72 hours on the following holidays:

Martin Luther King holiday (mid-January 2023)
President’s Day (mid-February 2023)
Memorial Day (late May 2023)

These closures will shorten the time needed to complete the project. Caltrans will provide additional holiday closure information as soon it becomes available. The public will be notified in advance via traffic advisories, a webpage and social media.

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.

A map showing the closure area on I-680 between Sunol and Pleasanton in Alameda county.

All lanes of northbound I-680 will be closed from 10 p.m. to 5 a.m. Monday through Friday. Weekend closures are not anticipated, barring unforeseen circumstances. 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. Detours for the December closures are as follows:

Detours

Regional detours will be activated to advise motorists coming from the South Bay to take I-880/SR-238/I-580 instead of I-680.
For closures between the Koopman Road and Sunol Boulevard interchanges:
680 North Trafﬁc
Exit I-680 at Calaveras, take Paloma Way, take Pleasanton Sunol Road and re-enter northbound I-680 at Sunol Boulevard.
580 East Trafﬁc
Take eastbound SR-84 to I-580.
For closures between Sunol Boulevard and Bernal Avenue:
680 North Trafﬁc
Exit I-680 at Sunol Boulevard, take Bernal Avenue and re-enter the freeway from Bernal Avenue
580 East Trafﬁc
Take eastbound SR-84 to I-580.