Term of the Road Dictionary


  • Language : PIARC Road Dictionary / English
  • Theme : Operations Road Surface Characteristics
  • Definition : Surface irregularities of a road pavement with horizontal dimensions greater than 500 mm and vertical dimensions exceeding the tolerance of the design specifications. Note: unevenness is usually identified in two forms: longitudinal or transverse. The former is associated with riding comfort and the latter with rutting [ISO].
  • Synonyms : roughness (US)

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