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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

transponder

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].