Caltrans Initiated Overnight I-805 Closures in San Diego
Nightly closures at Palm Avenue are required to facilitate ongoing infrastructure improvements through 2028.
Updated on Sept. 28, 2026 in Construction
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Caltrans has scheduled intermittent overnight closures for sections of Interstate 805 at Palm Avenue in San Diego to support a $31 million infrastructure project. The work includes structural improvements, pedestrian paths, and new landscaping.
Why it matters
These closures are essential for the expansion of the Palm Avenue overcrossing, a key effort aimed at modernizing regional transit and safety infrastructure. The project represents a collaborative effort to integrate better bike and pedestrian access into existing highway systems.
The $31 million project carries a duration of nightly closures from 9 p.m. to 5 a.m. to minimize traffic disruption.
The players
Caltrans
The California Department of Transportation is the state agency responsible for the design, construction, and maintenance of the California state highway system.
City of San Diego
The municipal government of San Diego is a partner in the funding and oversight of local infrastructure improvement initiatives.
Federal Highway Administration
The FHWA is an agency within the U.S. Department of Transportation that provides financial and technical assistance to states for highway planning and construction.
The details
Northbound I-805 will close on Sundays and Tuesdays, while southbound closures occur on Mondays and Thursdays. During these times, traffic is redirected through routes including SR-54, SR-905, and I-5 to bypass the construction zone at the Palm Avenue overcrossing.
Timeline
Construction on the project began in June 2026.
The first round of overnight closures commenced on September 28, 2026.
Project completion is expected by fall 2028.
Market Landscape
This project aligns with the national trend of prioritizing multi-modal infrastructure, moving beyond simple roadway expansion to include pedestrian and cycling accessibility. It positions the region to better manage future traffic demand by upgrading aging transit corridors.
Commuters should anticipate detours via SR-54, SR-905, and I-5 during the designated overnight hours. Residents who travel through the Palm Avenue area during the evening should plan for longer transit times and potential local congestion.
The takeaway
Drivers are encouraged to check local traffic alerts regularly, as the construction schedule remains subject to change until the project concludes. Planning ahead by using designated detours can help reduce the impact of these overnight closures on late-night travel.
Further reading
Learn more about local development updates in the Construction section.
Source note: This article includes information reported by KSWB 5/69.
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