VIDEO - Using Brine to De-Ice Highways
Spreading solid salt on the highway to melt ice takes some time as it has to dissolve in water in order to do the job. Applying salt in the form of a brine solution speeds up the process. This video from the Mainroad Group, one of B.C.'s road maintenance contractors explains about the use of brine instead of rock salt.
Spraying brine on the highway before a weather event is preventative maintenance. The salt will already be there to prevent snow and ice from forming or sticking to the pavement surface so it is easier for the plows to remove.
There is more information on the use of brine at the Ministry of Transportation and Infrastructure's (TranBC) website.
While we are on the topic, here's some important information about sharing the road with snow removal equipment also.