bottomups
Bad Moon Risen'
Icemelt works pretty good to around 10 below. I use it on my sidewalk and around downspouts.They make this chemical called icemelt that stops ice from forming down well into the negatives. It doesn't go bad, either.
However, the cost is prohibitive for municipalities to use on roads. Most of the towns on my route only use sand or a salt/sand mixture on the side roads.