With porous asphalt, deicing chemicals can be reduced by 75 to 100 percent.
Researchers in New Hampshire observed side-by-side asphalt parking lots, one porous and one conventional. They found that with only 0 to 25 percent of the salt, the snow and ice cover on the porous asphalt was the same as on the conventional dense-graded asphalt. This reduction was achieved without compromising braking distance or increasing the chance of pedestrians slipping and falling. In a number of cases, it has been reported that no deicing chemicals are needed, and plowing alone is sufficient to remove snow from the paved surface.