Communications: electrical – Traffic control indicator – Traffic control or local controller failure indicator
Reexamination Certificate
2008-05-27
2008-05-27
Trieu, Van T. (Department: 2612)
Communications: electrical
Traffic control indicator
Traffic control or local controller failure indicator
C340S907000, C340S642000
Reexamination Certificate
active
07378987
ABSTRACT:
A method and apparatus for monitoring for Red Fail faults in a traffic signal control system. Traffic control signals generated by a traffic control unit are grouped into channels. Certain channels are specified for Red Fail testing in which all lights in a given channel are inactive at the same time. Channels which are not specified are not subject to Red Fail testing, but other conflict testing can still be performed on these unselected channels.
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Reno A & E
Trieu Van T.
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