OPTIMIZATION OF THE LOW BEAM PATTERN OF ILLUMINATION. SOME EXPERIMENTAL RESULTS RELATED TO THE ILLUMINATION ABOVE CUT-OFF

Visibility distances to targets on the road have been measured in simulated full-scale opposing situations between two passenger cars on low beams. The level of low beam illumination above the cut-off was varied in four levels from half the normal to four times the normal illumination of European low beams. The results show that the optimum (absolute)level of illumination above the cut-off is related to the reflection properties of the visual targets. The most important parameter seems to be the relation between the level of illumination just above and just below the cut-off.

• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • Helmers, G
  • Fernlund, M
  • YTTERBOM, U
• Publication Date: 1990

Media Info

• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Cutoff walls; Illuminating engineering; Low beamed headlamps; Reflection; Technology; Visibility
• Geographic Terms: Europe
• Old TRIS Terms: Cutoffs; Illumination engineering; Low beamed headlights
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00600291
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: VTI-353A
• Files: TRIS
• Created Date: Oct 31 1990 12:00AM