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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

fundamental diagram

  • Language : PIARC Road Dictionary / English
  • Theme : Operations Traffic Traffic Engineering
  • Definition : Graphic representation of the relation between mean traffic flow and mean traffic concentration on a road section, for a given time interval.
  • Synonyms : flow-concentration diagram

Fundamentaldiagramm

  • Language : PIARC Road Dictionary / German
  • Theme : Betrieb Verkehr Verkehrstechnik
  • Definition : Graphische Darstellung des Zusammenhangs zwischen Verkehrsstärke und Verkehrsdichte für einen bestimmten Streckenabschnitt.