According to snow treatment directions, when is the combination of salt and calcium chloride effective?

The effectiveness of a combination of salt and calcium chloride is particularly noted under certain temperature conditions. When temperatures are low, specifically below zero, calcium chloride is highly effective because it generates heat through an exothermic reaction when it dissolves in water. This allows it to work efficiently even in extremely cold conditions, which is a key advantage over salt alone, as regular salt can become less effective as temperatures drop.

In contrast, other scenarios, such as above freezing temperatures or in summer conditions, do not align with the characteristics of calcium chloride and salt's optimal use. Therefore, understanding the specific conditions under which the combination is most effective aids sanitation workers in making informed decisions for effective snow and ice management.