Backup traffic signal management system and method

Details Backup traffic signal management system and method Backup traffic signal management system and method

1995-03-17

1997-08-19

Crosland, Donnie L.

Communications: electrical

Traffic control indicator

Traffic control or local controller failure indicator

340906, 340907, 340912, 340916, G08G 1097

Patent

active

056593058

ABSTRACT:
An backup vehicular traffic control system employs a connector-switch including a normally-closed electrical switch connected in series between a traffic signal and a primary control system. In the event of an emergency condition, such as a failure of the primary control system and/or failure of a primary power source, or in the event of a shutdown condition, such as a shutdown of the primary control system and/or shutdown of the primary power source, a connector is manually connected to the connector-switch. The normally-closed electrical switch is opened when the connector is connected to the connector-switch, disconnecting the primary control system from the traffic signal. Also upon the connection of the connector to the connector-switch, an auxiliary control system coupled to the connector is coupled through the connector and connector-switch to the traffic signal. After being connected, the auxiliary control system assumes control of the time of operation of the traffic signal.

REFERENCES:
patent: 3881169 (1975-04-01), Malach
patent: 4463339 (1984-07-01), Frick et al.
patent: 5327123 (1994-07-01), Heimann et al.

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