Road Salt may damage traffic infrastructures
“Automobile owners aren’t the only ones who need to worry about corrosion. Road salt can also damage bridges, parking garages, railroads, and other public transportation infrastructures. This corrosion damage is estimated to cost the highway and automobile industries $3.5 to $7 billion per year in the U.S.”[1]
[1] http://www.bridgestonetire.com/tread-and-trend/tire-talk/pros-and-cons-of-using-road-salt-in-winter