The best visibility during rainy conditions
Porous Asphalt allows rainwater to drain through the pavement surface, reducing the amount of splash and spray kicked up by vehicles, and is providing the best visibility during raining conditions.
“The most effective solution for improving tire-pavement contact in wet weather conditions and to reduce, and in most cases, suppress splash and spray is the use of drainage wearing courses consisting of porous mixes. These surfaces, which are 40 to 50 mm thick and have a void content of or in excess of 20%, are capable of draining water from the pavement surface except in cases of very heavy rainfall. Even when this drainage layer becomes saturated, it can still remove water from the tire-pavement interface by channelling it through its pores and inner channels.” [SYSTEM FOR MEASURING SPLASH ON WET PAVEMENTS by Pérez-Jiménez, Félix; Martínez, Adriana; Sánchez-Domínguez, Fernando; Ramos-García, José Antonio; Paper submitted for the 2011 Annual Meeting of the Transportation Research Board. TRB, Washington DC, USA.]