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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

sound beacon system

  • Language : PIARC Road Dictionary / English
  • Theme : Structures Tunnels
  • Definition : Loudspeakers located at emergency exits and used in case of tunnel evacuation. Note: the beacons may emit a specific sound combined with messages, to help users locate the exit and provide them with appropriate evacuation instructions.

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