PHOTOGRAPHIC TECHNIQUE FOR ESTIMATING SKID NUMBER AND SPEED GRADIENTS OF PAVEMENTS

A technique has been developed for determining skid number and speed gradients of pavements from a moving vehicle. Photographs were made of the pavement by using a light at low-incidence angle to project shadows across the peaks and valleys of pavement macrotexture. The photographs were compared to standard photogrpahs of pavements with known gradients. The ratings were converted to estimated skid number and speed gradient by using a regression equation. The technique is economical, valid, and reliable. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References;
  • Pagination: pp 13-21
  • Monograph Title: Pavement surface properties and performance
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00173175
  • Record Type: Publication
  • ISBN: 0309026598
  • Report/Paper Numbers: HS-022 762
  • Files: TRIS, TRB
  • Created Date: May 3 1978 12:00AM