Patent ID: 7151468
Filing Date: 2006-12-19
Classification: G01S,G08G

Abstract:
1. An on-site roadway warning system for alerting a driver of an approaching vehicle of a need to brake the vehicle, the warning system comprising: a transceiver for radiating electromagnetic energy toward the approaching vehicle and receiving reflected energy from the vehicle; a processor associated with the transceiver for processing data about the reflected energy in relation to data about the radiated energy to yield data disclosing both range of the approaching vehicle from the transceiver and rate at which the vehicle is approaching the transceiver; the processor containing stored data that correlates various combinations of range and speed that distinguish between combinations of potentially dangerous range and speed and combinations that are not potentially dangerous; the processor operating to process the data disclosing range of the approaching vehicle from the transceiver and rate at which the vehicle is approaching the transceiver in relation to the stored data; and a signaling device that is activated to signal the approaching vehicle when the processor determines that the data disclosing range of the approaching vehicle from the transceiver and rate at which the vehicle is approaching the transceiver correlates with stored data that identifies a potentially dangerous combination of range and rate.