Northbound Highway 101 in San Mateo was shut down for nearly nine hours after a big rig overturned Monday night, according to California Highway Patrol.

Around 10:32 p.m., the big rig flipped and caught fire at the exit for eastbound 92.

CHP issued a traffic alert at 10:52 p.m., closing all lanes to traffic.

At one point both east and westbound Highway 92 interchanges were closed.

Northbound 101 to westbound reopened at 11:20 p.m.

The exit to eastbound 92 remained closed until almost 8:00 a.m. Tuesday.

There were no reports of injuries.

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