Question

Sand is spread on tracks covered with snow? why?

Answer 1

Hey mate here is your answer

When the track is filled with snow, their is a friction so it is impossible for any transportation to drive but when the sand is pour into the track , it has more friction than snow so that's why sand is spread on track covered with snow.

Hope this answer will help you!!

Answer 2

When snow melts, coarse grains of sand provides friction and prevents slipping of vehicles. Thus salt is much experience and not environment friendly.