Time lapse aerial photography of a town appears to be an ideal method for collecting data on all types of traffic movement. It does not cause interference with traffic and requires a smaller number of operators than other methods. As a permanent record is obtained, it is possible for different parameters to be examined. It is possible with 70 mm film, and existing techniques to cover a square kilometre of ground area. Helicopters, although more costly than fixed wing aircraft are necessary for measurements requiring continuous sequences of photographs of an area. Fixed wing aircraft are less suitable for studies of link occupancy and parking counts. The principal limitations in the use of aerial photography are weather and lighting conditions, and problems of analysis. Specialized equipment may have to be developed for measurements other than simple counts. The initial cost of collecting data tends to be higher than that of other methods because of the skilled services and expensive equipment required. There is also a risk that records may be lost by uncontrolled movements of the aircraft. At present the method is only practical for use by research organizations or specialised firms. (TRRL)

  • Supplemental Notes:
    • Conference on Traffic Data Collection, Leeds University, January 8-9, 1979.
  • Corporate Authors:

    University of Leeds

    Department of Civil Engineering
    Leeds, West Yorkshire  United Kingdom  LS2 9JT
  • Authors:
    • LEONARD, D R
  • Publication Date: 1979

Media Info

  • Features: Figures; Tables;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00335299
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Nov 23 1981 12:00AM