Linda, I'm not sure exactly where in MI you are but when they rebult the S-Curve in Gand Rapids they did put some sort of anti-icing system in the road that was supposed to keep the whole thing free from ice. I don't usually drive in downtown GR so I am not sure exactly how effective it is, but I do recall that is was quite costly!!!Anti-icing system on S-curve
Second paragraph tells that they did it.Tells how it is done
Which sounds like the airport stuff mentioned above. Read section "Spanning Land and Water"Great article about cost of this
Read section on "Michigans Work"
Being that I live in Michigan I understand!!! The roads are just terrible sometimes and Lake Effect snow is a real boar. Just last night we got dumped on here. About 4 inches in a matter of a couple hours. And everything was freezing solid. We almost didn't make it up the very iny hill to get in the driveway and our neighbor got stuck in hers!
Gotta love Michigan!