Boots – shoes – and leggings
Patent
1980-09-03
1983-06-28
Atkinson, Charles E.
Boots, shoes, and leggings
364437, 364438, 340 31A, 340 38R, 340 37, 340 41R, G06F 1548, G08G 100
Patent
active
043909515
ABSTRACT:
An apparatus designed to monitor traffic on a section of road of given length L for modifying the operation of a traffic light at an intersection approached by that road comprises speed-sensing circuits at opposite ends of the surveyed road section, the entrance-side circuit also emitting pulse trains reflecting the lengths Li of passing vehicles. A calculator determines from the measured entrance and exit speeds a mean overall speed VM which is inversely proportional to the mean transit time L/VM and enables the computation of an occupancy density DE(t)=.SIGMA.Li/L from which in turn an encumbrance P(t)=DE(t)/VM is derived. The traffic light can be controlled directly by a signal which is proportional to this encumbrance P(t), or which represents a related function F(t). An additional modification of the operating cycle of such traffic light can be brought about by a signal indicating the approach of a vehicle of unusual length on the surveyed road section.
REFERENCES:
patent: 3406395 (1968-10-01), Zupanick
patent: 3445637 (1969-05-01), Auer
patent: 3920967 (1975-11-01), Martin
patent: 4023017 (1977-05-01), Ceseri
patent: 4167785 (1979-09-01), McReynolds
"Thomson-CSF"
Atkinson Charles E.
Dubno Herbert
Fleming Michael R.
Ross Karl F.
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