GLARE DUE TO LIGHTING INSTALLATIONS AT THE ROADSIDE

BLENDING FRA LYSANLEGG VED SIDEN AV VEGEN

Lighting installations for petrol stations, building sites, sports facilities etc at the side of a road often cause glare and thus constitute a traffic hazard. In order that an object may be seen against a background, there must be a sufficient difference in luminance between them. Glare causes a reduction in this difference. Glare depends on the placing of the installation in relation to the road. On bends and tops of hills, glare is considerable. Recommendations are given concerning the placing of an observer when glare measurements are made. Formulae are given for calculation of glare. It is recommended that the luminance of all light sources at a roadside installation should not exceed 0.05 cd/sq M on an unlit road, while on a road with lighting the degree of glare D due to all sources should not exceed 0.12, where D = lv/(l+lv), lv being the external luminance and l the mean luminance of the carriageway. A lot of glare from petrol stations comes from the actual light fittings; these should therefore be properly screened. Generally speaking, light sources should not be directly visible from the road. Petrol stations and other installations should not be sited on bends or hilltops. /TRRL/

  • Supplemental Notes:
    • Nordisk Belysningskongress I, Stockholm, 24-26 May, 1977.
  • Corporate Authors:

    Svenska Belysningssaellskapet

    c/o Ljuskultur, Skepparg 27, Box 5512
    114 85 Stockholm,   Sweden 
  • Authors:
    • Bjoerset, H H
  • Publication Date: 1977

Language

  • Norwegian

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 120-143

Subject/Index Terms

Filing Info

  • Accession Number: 00184503
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 3 1979 12:00AM