A vehicle struck a concrete barrier and a generator-powered light fixture near the San Ysidro Port of Entry, blocking southbound traffic into Mexico.
About 25 to 30 gallons of diesel fuel was spilled from the light fixture across all the lanes of Interstate 5, according to the California Highway Patrol.
This prompted a SigAlert at 6:18 p.m. All lanes reopened at around 10:20 p.m.
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