The pollution of effluents from pervious pavements of an experimental highway section: first results

The use of pervious pavements as covering materials for streets has increased. The reason for the use of such pavements is their ability to minimise noise, aquaplaning and water spreading by tyres during rainfall events. Two years ago the province of Baden-Württemberg constructed an experimental highway section to obtain information about the noise-decreasing effects as well as the influence of winter maintenance on the physical behaviour of porous road pavements. In parallel, at the end of 1989 investigations were begun to examine the chemical properties of the drainage water passing through the upper 40 mm of the pervious layer (porous asphalt) with a porosity of up to 20 vol%.