Along the same lines another thing that I think most of us in the US this winter (or least parts of it) had to deal with are potholes. I've gotten quite good at avoiding the potholes around me by preparing for their presence well ahead of where they actually are. In one case there's one right at the top of a hill near me and right under the passenger side tires if you don't move slightly to either side. But because of the incline of the hill you can't even see it until it's less than a few feet in front of you. I'd hope they figure out how to detect these but it seems like a pretty difficult problem.