Chem guy could you explain in a easy way why the salt the road crews usually dump on our MI roads don't work when it gets too cold? We have been in blizzard warnings the last few days and they say a big part of it, besides the blowing and drifting snow and white outs is because the salt usually dumped on the roads won't work in the low temps. I have some driveway melt stuff that must have more than just salt in it because it melted the ice on the stairs and walk way. But it wasn't cheep. Blizzard temps in west MI is unusal even with our usual lake effect snow. If the salt can't work what does? Other places used to continuous weather must do something? When I briefly lived in a farm with a wood stove we used ashes in the driveway sometimes, I think...Or maybe somone else can explain why and what they do? Thanks, Kimrst in Buurrry West Michigan