It’s open more often than not, closures are generally due to accidents or avalanche control and normally don’t last too long. Give yourself some extra time just in case and be sure to keep water, snacks, and a warm jacket and or blanket with you in case you need to wait a few hours. You might also plan on possible alternate routes. Lots of folks detour over stevens pass(highway 2) when 90 closes…. If you have traction tires and or chains it’s not a bad way to go.