Originally Posted by RoundlightKnight
My commute is 4 miles, about 3 of which can be interstate if I want but when its slick I take residential streets to avoid traffic.
Because of speeds and traffic volume, interstates maintain more surface temperature and are usually clear when everything else is slick. The problem is, sometimes they still get snowed under if there's enough coming down. When they're clear it means an easier ride home but if they're not it's an un-fun place to be. I've never gotten this one totally figured out, I still guess wrong sometimes.