Fiber Optic Infrastructure Installation Along I-80 In Contra Costa Solano and Alameda Counties

Full Closure of Eastbound I-80 San Pablo Avenue on and off Ramps Sunday, March 29, 2026Additional closures along I-80, I-980 and I-580 connectors continue Sunday through Thursday, Nightly,10 PM -5 AM through May 2026

Contra Costa, Solano & Alameda Counties - Caltrans is announcing ongoing closures related to the Fiber Optic Infrastructure Project along both eastbound and westbound I-80, I-980 and I-580 in Contra Costa, Solano and Alameda Counties. The construction work, which focuses on installing new fiber optic infrastructure, will be conducted during overnight hours, specifically between 10 PM and 5 AM to minimize traffic disruption.

The project will move eastbound, starting at McDonald Avenue and progressing toward the Carquinez Bridge. The first major closure is scheduled for Sunday, March 29,2026 from 10 PM to 5AM of the San Pablo Avenue on and off ramps, with additional nightly closures to follow on the I-980 to-I-580 interchange toward the connector between I-580 and I-80; throughout the duration of the project.

What to Expect:

Scheduled Lane and Ramp Closures
Caltrans will implement nightly lane and ramp closures on eastbound Interstate 80 (EB I-80) between McDonald Avenue and the Carquinez Bridge. These closures are scheduled to occur Sunday through Thursday, from 10 PM to 5 AM throughout May 2026.

EB San Pablo Avenue Full On/Off Ramp Closures
There will be a full closure of the eastbound San Pablo Avenue on and off ramps on Sunday, March 29, 2026, between 10:00 PM and 5:00 AM. Please note that this schedule is subject to change.

Detour Plans for Sunday March 29, 2026
During the closure period, motorists are advised to follow posted detour routes.

Detour plan for EB I-80 San Pablo Ave on Ramp

1. Left turn onto San Pablo Ave
2. Right turn onto San Pablo Dam Rd
3. Left turn onto Route 80 On-Ramp

Detour from traveling NB San Pablo Ave

1. Right, turn onto Roosevelt Ave
2. Left turn onto McLaughlin St
3. Left turn onto Clinton Ave
4. Left turn onto Amador St
5. Continue on to I-80 EB on-ramp

Detour plan for EB I-80 San Pablo Ave Off Ramp

1. Take the Central Ave exit or the Following exit

*All work is weather dependent and subject to change.*

This project is tentatively scheduled for completion by Winter 2028.

Changeable Message Signs (CMS) will provide advance notice for motorists traveling in the area. Drivers may experience minor delays and are advised to plan ahead and allow extra time. Be work zone alert, drive with caution through the work zone.

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
Follow us on X: https://x.com/CaltransD4
Or call 1-800-472-7623, 1-800-427-ROAD for state highway conditions statewide.