CASTAIC, Calif. (KABC) — (UPDATE 6:30 p.m.): According to Cal Trans, all lanes on I-5 are open near Lake Hughes Road after tanker truck incident. The shutdown was finally lifted around 6 p.m., lasting around three hours.

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Holiday traffic is at a standstill and backing up for miles on the northbound 5 Freeway in the Castaic area after a truck spilled 4,000 gallons of hydrogen peroxide in lanes.

The CHP shut down all lanes northbound in the Castaic area after the spill, reported just after 3 p.m.

The spilled material was described as 4,500 gallons of hydrogen peroxide.

People were seen getting out of their parked cars on the freeway, walking around and even skateboarding as they waited.

This story will be updated as details become available.