Patent ID: 8436746
Filing Date: 2013-05-07
Classification: G08G

Abstract:
1. A system comprising: a transmitter configured to transmit activation signals to a device associated with at least one potential hazard in proximity to the transmitter, a receiver configured to receive hazard signals generated by the device associated with the at least one potential hazard in response to the activation signals, wherein the hazard signals have a variance in strength based at least in part on a strength of the transmitted activation signals, and wherein the hazard signals are modulated and include at least one characteristic associated with the at least one potential hazard; an annunciator configured to indicate the at least one potential hazard based on the received hazard signals and further configured to provide information relating to the at least one characteristic; and a processor in communication with the transmitter, the receiver, and the annunciator and configured to interpret the received hazard signals and to determine whether the hazard signals are increasing or decreasing in strength and to instruct the annunciator to provide an indication of the strength.