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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

improved subgrade

  • Language : PIARC Road Dictionary / English
  • Theme : Roads Design Pavements
  • Definition : Capping layer formed by treating the subgrade material in situ [CEN].

verbesserter Unterbau

  • Language : PIARC Road Dictionary / German
  • Theme : Straßen Entwurf Fahrbahnbefestigungen
  • Definition : Bodenverbesserung, durch Behandlung des Unterbau-/Untergrundmaterials vor Ort geschaffen (CEN).
  • Synonyms : verbessertes Untergrund