Understand Salt Effectiveness in Cold Weather

What happens here

The host explains that salt becomes ineffective below 10°F (-12°C). For effective de-icing in colder temperatures, salt needs to be mixed with other chemicals to activate it, or the pavement temperature must be higher than the ambient air temperature. He demonstrates the presence of residual salt by showing how it melts snow on contact, but also points out areas where ice remains due to low pavement temperatures.

Goal: Educate on the limitations of road salt and the need for alternative de-icing methods in extreme cold.