Traffic flow measuring method and apparatus

Details Traffic flow measuring method and apparatus Traffic flow measuring method and apparatus

1991-04-29

1994-02-01

Swarthout, Brent A.

Communications: electrical

Vehicle detectors

With camera

340934, 346107VP, G08G 1017

Patent

active

052835731

ABSTRACT:
This invention relates to a method an apparatus for measuring traffic flows or in other words, the flows of vehicles, inside and near a crossing, and is directed to provide method and apparatus capable of extracting vehicles with a high level of accuracy.
Overlap of vehicles can be avoided by setting the field of a camera not to a range from the inflow portion to the vicinity of center of the crossing, but to a range from the center to the vicinity of the outflow portion (151) of the crossing. Accordingly, accuracy of traffic flow measurement can be improved.

REFERENCES:
patent: 2710390 (1955-06-01), Forse
patent: 3663937 (1972-05-01), Bolner
patent: 4839648 (1989-06-01), Beucher et al.
patent: 4847772 (1989-07-01), Michalopoulos et al.
patent: 4884072 (1989-11-01), Horsch
patent: 5041828 (1991-08-01), Loeven
patent: 5066950 (1991-11-01), Schweitzer et al.

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