Two methods of texture measurement are described: the outflow meter and profile analysis. The outflow meter measures the time for a fixed quantity of water to escape between a rubber seal and the pavement. Its development from a simple gravity flow instrument to a high-pressure device is described. The single number outflow parameter is not sufficient to provide adequate prediction of the pavement friction-speed relationship, but it is a parameter sensitive to pavement porosity in addition to surface texture. The profile tracer produces an electrical signal analogous to profile height as a stylus traverses the pavement. This signal is recorded and reduced to a meaningful set of parameters describing the root mean square values of the surface height and its derivatives. The profile spectral density is also obtained. Results for five test pavements are presented and compared with locked wheel skid data.

  • Supplemental Notes:
    • This paper was presented at a symposium on Surface Texture Versus Skidding: Measurements, Frictional Aspects, and Safety Features of Tire-Pavement Interactions, in Philadelphia.
  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Henry, J J
    • Hegmon, R R
  • Publication Date: 1975-7

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 15 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00126867
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Jan 14 1976 12:00AM