It's interesting how the WSDOT treats the roads at the various mountain highways. One thing I've noticed is that they sand the corners but not the straight stretches. This makes the approach to Stevens Pass, which is a not too windy major cross-state route, seemingly much less safe than SR 542, the Mt. Baker Highway, which is notoriously curvy and narrow with several extreme hairpin turns. 542 is so windy that the plows just sand the whole route so that it's like driving on a gravel road. Since it's not a through highway there is little to no traffic going the other direction in the morning (Don't count on this!!) and there aren't any semis.
In either case, the state does a good job of snow removal. While the rest of the government is falling apart infrastructure-wise, they seem to almost always have things well in hand. When it snows in the lowlands I just have to worry about getting from my driveway in Bellingham to the city limits where the state takes over the plowing. After that I can count on the roads being drivable.