Originally Posted by DrkAngel

Salt Snow
Below about 20 F, salt will not melt snow.
What it will do is mix in with the snow to a brownish semi-packed type ... ~slurry.

Worst of all, this slurry semi melts against the slightly warmer road surface.
Which means your tire almost sticks but what it sticks to slips against the road.

This "Salt Snow" is the most annoying-dangerous Winter hazard I've run into.
Even studded tires don't help much.