Porous asphalts

Porous asphalt pavements are an alternative technology that differs from traditional asphalt pavement designs in that the structure provide a condition for fluids to pass freely through it, reducing or controlling the amount of run-off from the surrounding area. By allowing rainfall and run-off to flow through the structure, this pavement type functions as an additional storm water management technique accounting for ground water recharge. The overall benefits of porous asphalt pavements may include both environmental and safety advantages including improved storm water management, improved skid resistance, reduction of spray to drivers, pedestrians and a potential for noise reduction.This paper provides an overview of the benefits, limitations and applications of porous asphalt pavements. Considerations for design and construction, as well as maintenance, are discussed