Traffic stop sign safety enhancement system

Communications: electrical – Traffic control indicator

Reexamination Certificate

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Details

C340S433000, C340S464000, C340S539100, C340S905000, C340S908000, C701S117000

Reexamination Certificate

active

07109884

ABSTRACT:
The system includes a stop sign device, a wave signal transmitter, a signal receiver and a warning signal. The wave signal transmitter is located at the stop sign device, that is it is near it, or is attached to it. The transmitter projects a wave signal outwardly in a direction from the front of the stop sign device, that is toward oncoming traffic that is expected to comply with the stop sign device. The wave signal of the transmitter has a predetermined frequency and transmission strength, and may be radio or IR or other wave signal. The signal receiver is adapted to receive a wave signal of the same frequency of said wave signal of the transmitter, so that when it is near the transmitter, it will receive that signal. The warning signal is a signaling device that is connected to the signal receiver and is adapted to operate when the signal receiver receives a signal from the wave signal transmitter, and will continue to signal a warning until the transmitter is passed or the system is shut down by an operator override.

REFERENCES:
patent: 5508699 (1996-04-01), Silverman
patent: 5635920 (1997-06-01), Pogue et al.
patent: 5831551 (1998-11-01), Geduld
patent: 6057785 (2000-05-01), Guthrie
patent: 6442473 (2002-08-01), Berstis et al.
patent: 6747574 (2004-06-01), Butzer et al.
patent: 6864784 (2005-03-01), Loeb
patent: 2005/0162261 (2005-07-01), Li

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