Westbound Interstate 80 was closed at the Donner Lake Interchange Wednesday afternoon after a big rig jackknifed on the highway amid wet conditions.
Caltrans first reported the traffic accident a little after 1 p.m. The crash was still blocking the highway as of 2 p.m. and the state agency estimated it would be closed for another hour.
Caltrans warned of major delays as traffic was passing by the crash along the shoulder.
The roadway was clear as of 3:40 p.m.