If you've ever driven around the outskirts of Boston, West of the city near the reservoirs, then you've probably seen the signs warning people that during icy conditions, that there has been NO salt placed on the pavement. They've followed that procedure for at least 25 years or so.
While a lot of people in Michigan have had cars literally rust off the frames due to excessive road salt, I was lucky. We grew-up where it was so cold that road salt wasn't effective so they used gravel instead. And where I went to school there were what we called 'stamp sands', tailings form the Copper mills, which was literally free for the taking and besides, theses tailings were nearly black so they absorbed the heat from the sun which helped to melt the ice and snow. Of course, that in the Spring they had to try and scoop-up as much of the left-over material which of course they recycled the following Winter.

OCU