On Fri, 07 Feb 2014 08:42:51 -0600, Markem
wrote:

On Thu, 06 Feb 2014 22:02:21 -0500, wrote:

I've heard that but brine is just water and salt. Not sure what the
advantage of that when it's too cold for salt to work at all.

The brine is sprayed before it snows on the roads, leaving a coating
on the road.

If it's sodium salt brine, it will help "black ice" or in the first
hour or so of a snowstorm. At very low temperatures, it's not going
to do anything at all. Well, it will make the roads slick as snot as
it freezes into a nice uniform layer. ;-)