US Patent 7167105 Traffic control device transmitter, receiver, relay and display system

A traffic control device information display system and method. In one embodiment, a receiver receives information about a traffic control device, a processor processes the received information to determine identification information for the traffic control device and to determine if the traffic control device has been improperly moved or knocked down, and a display displays the identification information to an operator and indicates if the traffic control device has been improperly moved or knocked down.