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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

onvlakheid

  • Language : PIARC Road Dictionary / Dutch
  • Theme : Exploitatie Oppervlakkenmerken van wegen
  • Definition : Oneffenheden in een wegdek, met horizontale afmetingen van meer dan 500 mm en verticale afmetingen groter dan de in het ontwerp toegestane afwijkingen. Toelichting: onvlakheid wordt doorgaans in twee vormen onderkend: langsonvlakheid en dwarsonvlakheid. De eerste houdt verband met rijcomfort, de tweede met spoorvorming [ISO/PIARC].