Vehicles were allowed to continue past the Donner Lake Interchange on Interstate 80 starting at 6:55 p.m., the California Department of Transportation said.

Chains are also required on all vehicles, except 4-wheel drive vehicles with snow tires on all four wheels, from Nyack Road in Placer County to the Nevada state line on I-80.

EARLIER VERSION:

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Westbound traffic on Interstate 80 is being turned at the Donner Lake Interchange and Truckee because of spinouts, the California Department of Transportation said on Sunday evening, Feb. 18.

Motorists are advised to use other routes.

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Chains are also required on all vehicles, except 4-wheel drive vehicles with snow tires on all four wheels, from Nyack Road in Placer County to the Nevada state line on I-80.

#TrafficAlert Winter driving conditions across Sierra area with chain controls on all highways. Spin outs and collisions snarling traffic causing traffic holds until cleared. Expect significant delays. pic.twitter.com/u7uKrOfAun

— Caltrans District 3 (@CaltransDist3) February 19, 2018

The National Weather Service Office in Reno has also issued a winter weather advisory for Truckee and Lake Tahoe until 10 p.m. Sunday. Additional snow accumulation of up to 2 inches is expected.

A winter weather advisory has been issued for the entire I-80 and Highway 50 corridors through the Tahoe Basin and western NV through 10 pm although slick conditions will likely persist overnight into Monday morning where roads are untreated. Check road conditions before leaving! pic.twitter.com/50XBEwbNzZ

— NWS Reno (@NWSReno) February 19, 2018

This story will be updated.