System, method and apparatus for manual control of a traffic...

Details System, method and apparatus for manual control of a traffic... System, method and apparatus for manual control of a traffic...

2008-03-27

2010-06-08

Crosland, Donnie L (Department: 2612)

Communications: electrical

Traffic control indicator

Intersection normally under local controller

C340S906000, C340S907000, C340S909000, C340S931000

Reexamination Certificate

active

07733242

ABSTRACT:
An application for a traffic control system includes an enclosure for containing the traffic control system that has an access door with a lock for controlling access to the enclosure through the access door. The traffic control system has an automatic mode of operation and a manual mode of operation, whereas the traffic control system automatically transitions a state of a plurality of traffic lights when in the automatic mode of operation and cycles the state of the plurality of traffic lights in response to a change signal when in the manual mode of operation. An automatic mode activation switch is housed within the enclosure. Activation of the automatic mode activation switch changes the state of the traffic control system from the automatic mode of operation into the manual mode of operation. A watchdog timer is coupled to the traffic control system, The watchdog timer is reset when the automatic mode activation switch is operated and in response to the change signal. If the watchdog timer expires, the traffic control system switches to the automatic mode of operation.

REFERENCES:
patent: 2829362 (1958-04-01), Terrill
patent: 3119093 (1964-01-01), Willyard
patent: 4135144 (1979-01-01), Elmasian
patent: 5073866 (1991-12-01), Daeges
patent: 6522263 (2003-02-01), Jones
patent: 2004/0051651 (2004-03-01), Carter
patent: 2007/0115139 (2007-05-01), Witte et al.

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