SAN MATEO -- The two left lanes of northbound U.S. Highway 101 in San Mateo remain blocked by a multi-vehicle collision this morning, according to the California Highway Patrol.
The collision, located just north of Peninsula Avenue on U.S. Highway 101 was reported at about 4:20 a.m., according to the CHP.
Three lanes of traffic reopened shortly before 5:30 a.m. The cause of the collision remains under investigation.
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