Traffic signalling system

Details Traffic signalling system Traffic signalling system

1995-04-03

1996-11-05

Hofsass, Jeffery

Communications: electrical

Traffic control indicator

Intersection normally under local controller

340944, G08G 107

Patent

active

055722024

ABSTRACT:
This invention pertains to a traffic signalling system, and methods of use, for monitoring a signal zone about an intersection having at least two approach paths, detecting each target entering the signal zone, and giving warning visual display signals to traffic in approach paths outside the approach path occupied by the respective target. The traffic signalling system may direct a second visual display signal, different from the visual warning display, toward the approach path occupied by the respective target, and may indicate, in the visual warning displays, the approach path occupied by the respective target. The traffic signalling system may concurrently receive and process stimuli from first and second targets in respective first and second different approach paths, and indicate, to the targets in the respective approach paths occupied by the targets, the presence of the other target in the other approach path. Timing apparatus may be included in the traffic signalling system, for setting and running a delay timer which maintains the detection indication for the set time after the target has been detected.

REFERENCES:
patent: 2903674 (1959-09-01), Schwab
patent: 3881169 (1975-04-01), Malach
patent: 4115757 (1978-09-01), Blahunka
patent: 4849735 (1989-07-01), Kirtley et al.
patent: 4908615 (1990-03-01), Bayrakaroglu
patent: 5187476 (1993-02-01), Hamer

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