Westbound I-80 traffic is being held at the Nevada state line and in Truckee due to weather over the summit, according to Caltrans. Re-opening is anticipated by midnight Wednesday.
Caltrans also says U.S. Highway 50 over Echo Summit is now open, but traffic may be held intermittently during the storm for avalanche control. Traffic was being held in both directions earlier.
Travelers using these routes should expect significant delays, says Caltrans.