Traffic & Transit

Overturned Semi-Truck Blocks Lanes On I-5 In San Diego

Motorists were advised to avoid the area and seek alternate routes.

SAN DIEGO, CA — Traffic was delayed when a big rig overturned and blocked multiple lanes on a San Diego freeway Thursday morning.

The crash happened around 4:40 a.m. Thursday on southbound Interstate 5 near Mission Bay Drive, just north of Balboa Avenue, according to the California Highway Patrol.

The overturned semi-truck was blocking the three right lanes of southbound I-5 and causing heavy congestion, according to Caltrans and the CHP.

Find out what's happening in San Diegofor free with the latest updates from Patch.

Authorities issued a SigAlert at 8:25 a.m.

Motorists were advised to avoid the area and seek alternate routes. All lanes were being diverted to state Route 52, according to the CHP.

Find out what's happening in San Diegofor free with the latest updates from Patch.

No injuries were immediately reported.

— Border Communications Center (@CHP_SD_Traffic) May 7, 2026
— California Highway Patrol San Diego (@CHP_San_Diego) May 7, 2026

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