TRUCKEE (KRON) — Interstate 80 over the Donner Summit was shut down Wednesday morning due to extremely low visibility. I-80 has since been reopened but chains will be required.

All westbound and eastbound traffic was at a halt. Officials say the blowing snow is causing low visibility and car spin outs.

Expect delays on I-80 over the Donner Summit. All WB and EB traffic still being held due to blowing snow and vehicle spin outs. pic.twitter.com/vvHfg4qmoL

— Caltrans District 3 (@CaltransDist3) January 4, 2017