Use alternative de-icers on roads
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
Background information and definitions
Use of chloride salts as de-icers along roads in winter can attract wildlife and may therefore increase vehicle-wildlife collisions, particularly in areas without natural salt licks. The main de-icers used by highway agencies are chloride-based salts such as sodium chloride, calcium chloride or magnesium chloride, or acetate-based de-icers such as potassium, sodium or calcium magnesium acetate. Reducing the amount of salt used or using alternative de-icers without salt, particularly in areas with high vehicle-wildlife collision rates, may reduce the attractiveness of roadsides to wildlife.
A study in Canada found that filling roadside salt pools with rocks (thus rendering them unavailable as salt-lick sources) reduced the number and duration of visits by moose Alces alces (Leblond et al. 2007; see Modify the roadside environment to reduce collisions by reducing attractiveness of road verges to mammals).
Leblond M., Dussault C., Ouellet J.-P., Poulin M., Courtois R. & Fortin J. (2007) Management of roadside salt pools to reduce moose–vehicle collisions. The Journal of Wildlife Management, 71, 2304–2310.