THE PHOTOGRAPHIC METHOD OF STUDYING TRAFFIC BEHAVIOR

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
  • Authors:
    • Greenshields, B D
    • Thompson, J T
    • Dickinson, H C
    • Swinton, R S
  • Publication Date: 1934

Media Info

  • Monograph Title: Proceedings of the Thirteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 7-8, 1933. Part I: Reports of Research Committees and Papers
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00228000
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 1971 12:00AM