A semi-truck overturned on I-15 in San Diego on March 4, 2026, causing a diesel spill, lane closures, and traffic delays after a collision with a speeding car; no injuries were reported.

A semi-truck overturned on southbound I-15 near Friars Road in San Diego on March 4, 2026, causing lane closures and major traffic delays. The crash, which occurred just after 1:30 p.m., involved a small blue vehicle reportedly speeding into the truck, leading to a diesel spill. CHP closed lanes three through five and the Friars Road offramp, with only the far left lane open. Hazmat crews responded to clean the spill. No injuries were reported, though three people were evaluated. The cause remains under investigation, and no reopening timeline was provided.