Alameda County Quarterly Caltrans Update

Header image for the Alameda County Quarterly Caltrans June 2024

Safety first -Cultivate excellence – Enhance and connect the multimodal transportation network –
Strengthen stewardship and drive efficiency – Lead climate action – Advance equity and livability in all communities


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Welcome to the second Alameda County Caltrans newsletter – the real scoop on Caltrans projects in your county!

Thanks to all who emailed with their thoughts about the first newsletter. It was great to hear from you, and the feedback was all positive. But whether it's positive or negative, please don't hesitate to let us know your thoughts about this one as well.

If you live, work, represent or serve Alameda County, this newsletter is for you. In this newsletter, Caltrans shares information with you on a quarterly basis about ongoing, upcoming or completed Caltrans projects; resources to get things done, like reporting potholes, litter and graffiti; and most importantly, answers to your questions.

Caltrans is making improvements that will benefit pedestrians, cyclists, commuters and other motorists. Pedestrians and cyclists just got an overcrossing at Berkeley’s Interstate 80 Gilman interchange. In Pleasanton, we’re doing paving work on northbound and southbound Interstate 680. These are just a couple of the projects – details below.

We look forward to keeping you updated!

Interstate 80 Gilman Interchange Bicycle-Pedestrian Overcrossing

Bicycle - Pedestrian overcrossing at Interstate 80 Gilman Interchange.

Pushing baby strollers, zipping along on bicycles, jogging, ambling and striding, people are using the newly opened bicycle-pedestrian overcrossing at the Interstate 80 Gilman interchange to cross over without the risk of getting mowed down by a car.

Almost three years after Caltrans broke ground, the overcrossing opened to the public May 11, giving folks on two wheels and two feet the opportunity to literally rise above the turning conflicts and other challenges currently presented by the interchange.

Those challenges will be resolved when Caltrans completes a double roundabout under construction at the interchange in early 2025. One temporary roundabout is already in place, and drivers have taken to it like ducks to water.

Caltrans working on the double roundabout at Interstate 80 Gilman Interchange.

Repair Work Underway on Niles Canyon Road (SR-84) in Sunol

Caltrans is repairing Niles Canyon Road (State Route 84) between Old Canyon Road and Main Street in Sunol. Work began the week of June 17, 2024.

Road damage at Niles Canyon Road (State Route 84) between Old Canyon Road and Main Street in Sunol.A new bridge on piles will be constructed at the location of the slip-out in the eastbound direction where a portion of lane collapsed into the creek four months ago.

Work will be performed between 8 p.m. and 5 a.m. Monday through Friday. Full closures will be in effect while work is being performed. Motorists should detour via Interstate 680 during these hours.

The roadway will reopen with one-way traffic control every morning. Work is scheduled to complete by the end of the year. Every effort will be made to open both lanes of Niles Canyon Road (SR-84) as soon as November if possible.

Unforeseeable events such as rain will affect the schedule.

One-way traffic control has been in effect on Niles Canyon Road since February when the ground under the road deteriorated, causing a portion of the highway to collapse.

Caltrans thanks the public for your patience as we work to repair the damage caused by the slipout.


I-680 Repaving Project In Pleasanton: Nighttime and Weekend Closure Schedule

As many of you know, Caltrans is currently repaving Interstate 680 in both the northbound and southbound directions in the Pleasanton and San Ramon areas. The entire project stretches from State Route 84 to the south to San Ramon to the north. The work will replace deteriorated pavement with new concrete for a smoother ride for motorists.

We thank the Bay Area’s motorists for avoiding the area when work is taking place. Here is the current schedule for nighttime and weekend closures:

Nighttime and Closure Schedules


  • Next weekend closure: September 20-23, 2024•SB I-680 will close at 9 p.m. Friday, September 20, reopening at 4 a.m. September 23
  • Nighttime closures continue Monday-Friday, 10 p.m. to 5 a.m. 
  •  For more information, visit

Detour map of closures for Interstate 680 Repaving Project.


  • No weekend closures planned in the next quarter
  • Nighttime closures continue Sunday-Thursday, 10 p.m. to 5 a.m.

The Interstate 680 (I-680) Express Lanes from State Route (SR) 84 to Alcosta Boulevard Project will close the gap between existing and in-progress high-occupancy vehicle (HOV)/ express lane projects directly to the north and south. The project extends for approximately nine miles on northbound and southbound I-680 through Sunol, Pleasanton, Dublin and San Ramon.

Work on southbound I-680 in the Pleasanton area began in February 2023. Work in this area is tentatively scheduled to complete at the end of 2024.



Current 2024 Alameda County Maintenance Highlights information graphic.

The Alameda County newsletter will be distributed on a quarterly schedule.

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Alameda County Public Information Officers

Janis Mara

General Information
(510) 286-4444

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