answer:Lane discipline, situational awareness, and the ability to keep your shit together when the roads get slippery. I’ve seen too many people totally panic and lose it when they first realize that snow and ice are nothing like dry pavement; they drive too fast, brake too hard, and can’t countersteer out of a skid to save their life (or the lives of others). I’ve seen too many people forget that they are not the only car on the road and try to merge even when they are in a position to roll down their window and open the door of the car next to them.