Term of the Road Dictionary


  • Language : PIARC Road Dictionary / English
  • Theme : Operations Transport Intelligent Transport Systems
  • Definition : Emitter-receiver device that responds automatically to a radar, radio or sonar signal and allows a vehicle to be located, identified and guided. Notes: 1. Transponders were initially used in air and sea navigation, but are also used in intelligent transport systems, in particular to facilitate the sorting of commercial vehicles at a roadside check facility or toll station. 2. In the automobile industry, a transponder may also be used to transform an ignition key into an electronic anti-theft device [OQLF].

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