Road Tunnel FM Rebroadcast System

A Road tunnel FM rebroadcast system is utilized in road tunnels to re-broadcast the FM radio programs received by the road listeners, outside the tunnel into the tunnel. The Road tunnel FM rebroadcast system has the facility for audio break-in of emergency announcements onto all of the FM Channels rebroadcast into the road tunnels. The Road tunnel FM Rebroadcast system can rebroadcast the radio program son the same frequency into the tunnel as the program frequency outside the tunnel.