Communications: electrical – Vehicle detectors – Speed and overspeed
Reexamination Certificate
2011-07-12
2011-07-12
Lieu, Julie (Department: 2612)
Communications: electrical
Vehicle detectors
Speed and overspeed
C340S905000, C340S907000, C340S933000, C340S934000, C340S941000, C340S917000, C340S572100, C340S539110, C340S686600, C701S117000
Reexamination Certificate
active
07978097
ABSTRACT:
A method, medium and implementing processing system are provided in which the presence of workers in a long highway construction zone is monitored and the electronically-controlled posted speed limit is adjusted in accordance with the detected presence of workers in the immediate area. In an example, Radio Frequency Identification (RFID) scanners or readers are strategically placed in a construction or working area. Such RFID reading devices may be embedded, for example, in construction speed limit signs. The displayed speed limit is controlled by the detected proximity of construction workers wearing RFID-embedded clothing, for example, such as safety vests or helmets. The speed limit sign includes logic to display one of many possible speed limit displays based on the nearest, and/or the number of RFID signals detected in a given area. Vehicular traffic is thereby enabled to travel faster through construction zones where no workers are present and, when appropriate, traffic is slowed when workers are present within a given proximity of the RFID reading devices.
REFERENCES:
patent: 6900731 (2005-05-01), Kreiner et al.
patent: 7042345 (2006-05-01), Ellis
patent: 2003/0191577 (2003-10-01), Decaux
patent: 2006/0181433 (2006-08-01), Wolterman
patent: 2006/0232406 (2006-10-01), Filibeck
patent: 2007/0152847 (2007-07-01), Quintos
patent: 2008/0162027 (2008-07-01), Murphy et al.
Arenburg Robert Thomas
Barillaud Franck
Cobb Bradford Lee
Dutta Shivnath
International Business Machines - Corporation
Lieu Julie
Mims Jr. David A.
Wilder Robert V.
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