Details are given of the equipment and techniques developed at TRRL. An assessment is given of the relative merits of fish-eye cine-technique compared with more direct visual observations for a variety of applications of traffic data recording. The first systems were made from an ordinary cine-camera and objective lens pointing up at the horizon-to-horizon image reflected in a downward facing convex mirror. A cosmos fish-eye lens adaptor is now fitted in the conventional objective of a scientific cine-camera. High resolution is needed because of the small scale over much of the image. Colour film helps to identify details in good light, but black and white can give better results where conditions are not ideal. The large field of view and depth of focus make the recording of data and time easy. A 15 M pneumatically extended telescopic mast is often used with a stabilised land rover to mount the camera. The fish-eye cine/still technique, although requiring more elaborate equipment and specialised processing than direct methods, is usually more efficient and reliable. Its main advantages are in the study of junction layout and pedestrain flows, journey times and pedestrian origin and destinations. It is also much more suitable for the study of vehicle paths and speeds than direct-visual methods. However, it is most often used to complement and check visual methods.

  • 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:
    • Blackmore, F C
  • Publication Date: 1979

Media Info

  • Features: Tables;
  • Pagination: 14 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00335298
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Nov 23 1981 12:00AM