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JRC has delivered the Radio Re-Broadcasting System for Tunnels so far that allows us to listen to the radio in tunnels and provide some information to the drivers in an emergency using some existing channels as the emergency channels. Recently, transportation infrastructure has been improved and long straight motorways have been designed, as a result, long tunnels have been prepared. Then, JRC has developed the new system that responds to multichannel and conserves space with the aim of good system to meet the need and to have high affinity with the drivers.

Hisayuki Sugai
Satoru Akahori
Masahiro Oka
Yoshiharu Kurosaki
Taichi Karaki