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Title: THE PHOTOGRAPHIC METHOD OF STUDYING TRAFFIC BEHAVIOR
Accession Number: 00228000
Record Type: Component
Abstract: A NEW METHOD IS PRESENTED FOR SECURING ACCURATE DATA ON TRAFFIC BEHAVIOR BY MEANS OF PICTURES; THE USE OF SUCH DATA IS ILLUSTRATED IN THE RELATION BETWEEN THE NUMBER OF VEHICLES PASSING A GIVEN POINT, THEIR AVERAGE SPEED, AND SPACING. FROM THE POSITION OF A VEHICLE IN TWO OR MORE PICTURES TANEN AT SHORT DEFINITE INTERVALS OF TIME ITS VELOCITY AND ACCELERATION CAN BE DETERMINED. A SIXTEEN MINUTE SIMPLEX MOVING PICTURE CAMERA WAS GEARED FOR A CONSTANT TIME INTERVAL BETWEEN EXPOSURES. FROM 6,000 PICTURES OF 794 VEHICLES THE FOLLOWING EXPRESSION FOR THE SPACING OF CARS WHOSE SPEEDIS CONTROLLED BY THAT OF THE LEADING CAR OF A GROUP WAS DEVELOPED: S = 21 + 1.1 V WHEREIN S IS THE DISTANCE CENTER TO CENTER IN FEET BETWEEN THE VEHICLES AND V IS THE VELOCITY IN MILES PER HOUR. /AUTHOR/
Supplemental Notes: Vol 13, ParT I, PP 382- 399, 7FIG. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Accession #: 01490412
Authors: Greenshields, B DThompson, J TDickinson, H CSwinton, R SEditors: Crum, Roy WPublication Date: 1934
Serial:
Highway Research Board Proceedings
Volume: 13 Media Type: Digital/other
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Operations and Traffic Management; Vehicles and Equipment
Files: TRIS, TRB
Created Date: Aug 15 1971 12:00AM
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