Winter driving in the USA

It's snowing again (yay! Skiing!) But the drivers here don't slow down, so some of them go off the road (if they're lucky enough not to crash into another vehicle), so the highway gets closed (boo! No skiing for us!) And we end up waiting in the truck which isn't as fun as a lift line. Bummer.
It's odd that they sometimes require chains on all vehicles except all wheel drive, but if you have all wheel drive, you're supposed to have "traction tires", but we saw plenty of all wheel drive vehicles spun out on the way up.  Chain enforcement consists of the state patrol slowing everyone down and waving cars and trucks through.  They need to be writing some tickets as well...
-mark.