Interstate 80 over Donner Summit was closed early Wednesday morning due to low visibility and snow. Many vehicles were stuck on the roadway for hours due to the closure.

The California Highway Patrol shared the above video, showing two troopers pushing a semi truck that was stuck on I-80.

“If you ever wondered how we get trucks going again once they spin out. Well here you go! CHP Truckee working hard to keep 80 moving!” they wrote on Facebook.

After nearly 4 hours, the roadway was reopened, but is still experienced significant delays.

Chain restrictions are currently in effect in several regions. CHP – Truckee listed the following restrictions at 10:05 AM (PST):

Chain Control:
I-80 is R2 Kingvale to Truckee.
Trucks are Maximum.
SR-89 is R2 Markleeville to Christmas Valley.
R1 Bliss State Park to Tahoe City.
R1 Squaw Valley to Truckee.
R1 Truckee to Sierraville.
Emerald bay is closed.
SR-28 is R1 Tahoe City to Lardin.
SR-267 is R2 Kings Beach to Northstar.
R1 Northstar to Truckee.
US-50 is R2 Twin Bridges to Meyers.
SR-88 is R2 Red Lake to Crystal Springs.
Carson spur is closed.