ROAD SURFACES IN TRAFFIC LIGHTING

The outcome of a number of investigations on road surface reflection properties is presented. Most of the investigations have been carried out at the Danish Illuminating Engineering Laboratory, and some are published here for the first time. The topics covered include measurement, description and classification, variation with humidity and weather, wear and age, of the road surface reflection properties, and also its relation with the recipe. The road reflection properties are discussed in connection to road lighting, automobile headlights and daylight. The more complex field is the one of road lighting and this book contains a review of design methods involving luminance, glare and economic criteria. Concerning unlit roads the influence of road reflection properties on visibility conditions are discussed via the results of computer simulations and actual experiments on situations in nighttime driving. The road surface luminance was calculated for different road surfaces in some typical daylight illuminations and discussed mainly in relation to visual comfort. In all three fields, road lighting, automobile headlight lighting and daylight, road surfaces being light, coarse and of diffuse reflection were found to be on the whole superior to dark, smooth surfaces of specular reflection. /Author/

  • Supplemental Notes:
    • This project was sponsored by the Ministry of Public Works, Denmark.
  • Corporate Authors:

    Danish Illuminating Engineering Laboratory

    ,   Denmark 
  • Authors:
    • Sorensen, K
    • NIELSEN, B
  • Publication Date: 1974-9

Media Info

  • Features: References; Tables;
  • Pagination: 386 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00098818
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: No. 9
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM