Welcome on piarc.org!

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.

This site uses cookies to optimize its operation. They allow you to securely access your personal space and download our publications. You accept their use by clicking on the "Accept" button.

Your basket
  1. Home
  2. Our activities
  3. Road Dictionary
  4. Term of the Dictionary | unevenness

Term of the Road Dictionary

unevenness

  • 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)

Back to theme