A modern skid-resisting, quick-draining surface absorbs light so that the control of its reflecting properties has proved almost impossible to achieve. However certain defined qualities have been established which represent current practices with dry road surfaces. The author reviews three important recent publications on road surfaces and investigates the errors involved in measurement and calculation of luminance and uniformity of seven different lighting installations. The parameters defining the reflecting properties are based on the Boer-Westermann formulae. The differences in the classification of wet and dry surfaces are examined. The three documents define the optical effects of the road surface, particularly the differences between dry and wet conditions. Wet surfaces present more problems than dry surfaces and have not previously been classified in terms of their reflective properties. The advantages of a coarse texture to lighting as well as skid resistance and drainage can be assessed. /TRRL/

  • Corporate Authors:

    Illuminating Engineering Society

    York House, 199 Westminster Bridge Road
    London SE1 7UN,   England 
  • Authors:
    • Holmes, J G
  • Publication Date: 1976-9-10


  • English

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 204-207
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00145384
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 13 1977 12:00AM