It does, but skidding off the road destroys them too. And throwing sand down really doesn't do much. Across the lake in Wisconsin we reuse the leftover brine

It does, but skidding off the road destroys them too. And throwing sand down really doesn't do much. Across the lake in Wisconsin we reuse the leftover brine from the cheese industry. Its more effective and more effective per unit used than straight salt. Takes the freezing point down to 0°F or lower. Combine that with how dry it gets here in the winter and you get a powerful combination of melting and sublimation.