2 why do we spay salt on icy roads?

Question

2 why do we spay salt on icy roads?

Answer 1

to melt the icy snow and to rust up your vechicle.

Answer 2

When this ice sets up on the roadways, there is a need to break down the icy layer, making it possible for tires to maintain traction on the surface of the roads.

This is where salt on icy roads comes into play. The presence of the salt causes what is known as freezing point depression.

That is, salt helps to lower the temperature at which water will freeze.

Answer 3

Salt lowers the melting point of the ice. When this happens, if it's not too cold, the ice will melt. If it is too cold, but they are still spreading salt, they  could be using the rock salt like gravel of sand to increase traction.

Answer 4

ahhhh...to melt da ice....