Patent ID: 8125348

Claim:
A system comprising: a first device carried by a vehicle and configured to send signals indicating a presence of the vehicle, further configured to alter an amplitude of the signals to provide an indication of a speed of the vehicle; a second device carried by a pedestrian and configured to receive the signals from the first device; and at least one speaker carried by the vehicle in communication with the first device, wherein the second device is configured to transmit activation signals to the first device in response to receiving the signals from the first device, and wherein the first device is configured to instruct the at least one speaker to issue an audible alarm in response to receiving the activation signals from the second device; wherein the second device is configured to alert the pedestrian regarding the presence of the vehicle in proximity to the pedestrian in response to receiving the signals from the first device, the second device being further configured to allow the pedestrian to select a type of alert received, and wherein the second device is further configured to sound a tone more frequently as the vehicle gets closer to the second device.