Good information. A few weeks ago the wife and I were heading up to do some shopping in a town about 60 miles north of here. The road goes through a narrow canyon with a river on one side. A car in front of us was going too fast and slid off the road and ended up on its top in the river. The river hadn't froze up at that time. Fortunately this high up in the mountains the river wasn't too deep and the people got out ok, just a little wet and cold.