The communication deals with the relation between the light reflecting properties and the composition of road surfacings. For this it is essential to be able to characterize, identify and classify surfacings with regard to their reflecting properties. The working group's research has revealed that this is perfectly feasible. Thus, identification is possible by means of two parameters based on three luminance coefficients. One parameter (two luminance coefficients) is sufficient for classification. the SCW-KEMA classification system introduced by the working group comprises two classes with the aid of which dry road surfacings can be ranked with sufficient accuracy for practical purposes. A "photometric range of preference" has been derived, which is defined in this report. It emerges that concrete roads and bituminous surfacings in which at least about 30 per cent (by mass) of the mineral aggregate consists of white crushed stone are usually within this "range of preference", as also are surface dressings with white chippings. This range is applicable both to public road lighting (high average road surface luminance combined with good uniformity) and to illumination by the lamps of motor vehicles. (TRRL)

  • Corporate Authors:

    Stichting Studie Centrum Wegnebouw

    Jansbuitensingel 14A
    Arnhem,   Netherlands 
  • Publication Date: 1984-4


  • Dutch

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 77 p.
  • Serial:
    • Issue Number: 53

Subject/Index Terms

Filing Info

  • Accession Number: 00394259
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Jul 31 1985 12:00AM