Communications: electrical – Traffic control indicator – Indication of time remaining before change of phase
Patent
1988-03-03
1989-05-02
Orsino, Joseph A.
Communications: electrical
Traffic control indicator
Indication of time remaining before change of phase
340907, G08G 1096
Patent
active
048272582
ABSTRACT:
the present invention discloses a method and apparatus for enabling motorists to anticipate the change of a traffic signal from green to red in sufficient time to enable the motorist to either stop or proceed through the intersection by altering his or her speed for both fuel conservation and safety purposes. The control system of the present invention includes a timer wherein timing signals are used to control the on/off condition of the red, amber, and green lights of a traffic light signal apparatus, as indicated below. The green light begins its cycle for a first relatively long period of time. At some relatively short period of time prior to the end of the green light's cycle, the ambler light comes "on" in a stedy state or blinking condition simultaneously with the green. This enables motorists to anticipate the impending change of the light from green-to-amber-to-red in order that they can properly gauge their speed for both safety and fuel conservation purposes. After a relatively short period of time, the green light goes "off" and the amber continues "on, " normally as a conventional steady state amber light. At the end of the amber light cycle, the signal switches to red for a relatively long period of time before turinging the red "off" and the green "on" to begin the cycle anew.
REFERENCES:
patent: 4490455 (1986-05-01), Fritzinger
Chan Annie H.
Orsino Joseph A.
Padgett, Jr. Charles P.
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