yeah, they use salt but have a pre-treatment for the roads which is one of the most caustic solutions known to mankind. What makes it bad is that it is hygroscopic and will absorb moisture right out of the air, keeping everything it touches damp. I get trucking magazines and there are articles on the stuff all the time about the problems over the road trucks are seeing. In the past few years, they're seeing unprecedented problems and it's all linked back to this solution, which is MUCH worse than salt ever was (is). Failing brake systems from rotted lines, to the shoes scaling and delaminating, lighting problems...the list goes on and on.
