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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

inductive loop

  • Language : PIARC Road Dictionary / English
  • Theme : Operations Transport Vehicles
  • Definition : Metallic loop laid under a road surface to sense the passing over and sometimes the speed of vehicles. Note: a metallic mass passing the loop changes the magnetic field, that causes a signal (frequency) sent through the cable.
  • Synonyms : induction loop / magnetic loop / electromagnetic loop