Indication method for driver of three or four wheel vehicle e.g. car, involves transmitting radio-frequency signal by communication device, where signal is received to inform that vulnerable vehicle is entered into danger zone

摘要

The method involves permanently transmitting a radio-frequency signal (1) by a communication device (6) arranged on a three or four wheel vehicle e.g. car (4). The signal is retransmitted by a communication device (5) arranged on a vulnerable vehicle e.g. two wheel vehicle e.g. motor cycle (3). A radio-frequency signal (2) containing identifiers of the vehicles is permanently transmitted by the device (5). The signal (2) is received by the device (6) to inform that the vehicle (3) is entered into a danger zone, where the frequency of the signal (2) is different from that of the signal (1). An independent claim is also included for a road prevention system comprising a communication device.