Importance

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Abstract

A road hazard warning system provides a warning to a motorist driving a vehicle of a stationary or moving hazard. A warning system includes a transmitter located near the road hazard that generates a radio frequency (RF) warning signal. A receiver is located in the vehicle and receives the RF warning signal. A receiver is located in the vehicle and receives the RF warning signal. The receiver is preferably integrated with an electronic device associated with the vehicle. The electronic device is at least one of a vehicle radio system, a tape player, a compact disc player, a television, an in-car computer, a video game, a telephone, and a global positioning system. The electronic device generates a warning output signal to a speaker or a display when the RF warning signal is detected by the receiver. A vehicle electronics interface is connected to the electronic device and provides a vehicle speed signal to the electronic device. The RF warning system contains data specifying a localized temporary speed limit. The electronic device compares the localized temporary speed limit with the vehicle speed signal and generates a second warning output signal with the vehicle speed signal and generates a second warning output signal if the vehicle speed exceeds the temporary speed limit. A vehicle speed controller is connected to the electronic device and reduces the vehicle speed if the vehicle speed exceeds the localized temporary speed limit.

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First Claim