US PATENT SUBCLASS 340 / 909
.~ Plural intersections under common central station control

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

907  DF  TRAFFIC CONTROL INDICATOR {8}
909.~ Plural intersections under common central station control {5}
910  DF  .~.~> Central station responsive to traffic detectors {1}
912  DF  .~.~> Standby cycling implemented if invalid transmission received or loss of transmission occurs
913  DF  .~.~> Offset control
914  DF  .~.~> Split control
915  DF  .~.~> Central station includes display of status of indicators

DEFINITION

Classification: 340/909

Plural intersections under common central station control:

(under subclass 907) Subject matter having plural highways with at least two crossings with a traffic control indicator at each crossing and each under the control of the same central station.

(1) Note. Mere continuous supply of power is not considered control means.