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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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Term of the Road Dictionary

porous asphalt

  • Language : PIARC Road Dictionary / English
  • Theme : Roads Materials Mixed Materials
  • Definition : Asphalt mixture of the gap-graded type designed to have a very high content (20 % by volume or more) of interconnected voids so as to facilitate the passage of water [CEN].
  • Abbreviation : PA
  • Synonyms : draining asphalt (US) / permeable friction course (US) / pervious coated macadam [obsolete]

offenporiger Asphalt

  • Language : PIARC Road Dictionary / German
  • Theme : Straßen Baustoffe Gemischtes Material
  • Definition : Asphalt offenporiger Art, der so zusammengesetzt ist, dass ein hoher Anteil (20 Volumen % oder mehr) mit untereinander verbundenen Hohlräumen zur Erleichterung des Wasserdurchgangs vorhanden ist (CEN).
  • Synonyms : Dränasphalt