Traffic synchronization device

Details Traffic synchronization device Traffic synchronization device

1983-01-21

1984-07-24

Groody, James J.

Communications: electrical

Traffic control indicator

Intersection normally under local controller

340913, 34030915, G08G 107, G08B 100

Patent

active

044620314

ABSTRACT:
A synchronization device for the control of an automobile traffic signal in synchronization with other traffic signals in the system. A present time clock in the device operates from the local alternating current power source. The synchronization device calculates the time difference between the present time and a daily re-synchronization time, divides that time difference by the length of the operating cycle of traffic signal, and generates a synchronization pulse whenever the residue of the division is zero. An offset or time-delay is added to the synchronization pulse and the traffic signal is operated in response to the delayed synchronization pulse so as to operate with the desired time delay in coordination with the other signals in the system.

REFERENCES:
patent: 3763466 (1973-10-01), Howard
patent: 3810084 (1974-05-01), Hoyt
patent: 4061902 (1977-12-01), Battle

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