Fatal Multi-Vehicle Crash Closes Northbound I-15 at Clairemont Mesa in San Diego
A fatal multi-vehicle crash shut down all northbound lanes of I-15 at Clairemont Mesa in San Diego early Monday, October 26, 2026. The CHP diverted traffic onto the SR-52 connector road during the investigation.
A fatal multi-vehicle crash closed all northbound lanes of Interstate 15 in San Diego early Monday, October 26, 2026, causing major delays during the morning commute, according to the California Highway Patrol as reported by San Diego Patch.
What happened
The CHP said the crash was reported at 5:15 a.m. on northbound I-15 at Clairemont Mesa. CHP San Diego described the closure as part of a fatal crash investigation. A SIG Alert was issued for an unknown duration.
Traffic impact
All northbound traffic was diverted onto the SR-52 connector road. Drivers were allowed back onto northbound I-15 beyond the crash scene. Traffic congestion grew as the closure stayed in place through the morning commute, and the CHP advised drivers to use alternate routes. In a 7 a.m. update, the CHP said all northbound lanes were expected to reopen within an hour. We have not independently confirmed the actual reopening time.
What is not yet known
Authorities had not released the number of vehicles involved, the number of people killed or injured, the identities of anyone involved, or the cause of the crash. The investigation was ongoing.
Sources: San Diego Patch, October 26, 2026: Fatal Multi-Vehicle Crash Shuts Down Northbound I-15 In San Diego, which includes CHP San Diego and CHP Border Communications Center alerts. This story will be updated if the CHP releases more verified details.
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