With high concentrations of heavy metals, the road runoff affects the surface water and soil along road sides, and has apparent influence on the health of animals and human being. It has become one of the most important problems for the environmental pollution control. Porous asphalt pavement can be used as an effective tool to mitigate the heavy metal pollution in road runoff, reduce the volume of road runoff during rainfall period, recharge the underground water, and improve the soil conditions under the ...