HALOGEN AND CONVENTIONAL CONTINENTAL EUROPEAN HEADLIGHTS- A COMPARISON OF VISIBILITY DISTANCES

USING VISIBILITY DISTANCE AS A CRITERIUM, HALOGEN AND CONVENTIONAL HIGH AND LOW BEAM HAVE BEEN EXPERIMENTALLY COMPARED IN A SERIES OF FIELD EXPERIMENTS. THE MAIN RESULTS WERE: (1) ON HIGH BEAM WITHOUT OPPOSING LIGHT, THE HALOGEN HEADLIGHTS OFFER ABOUT 25% LONGER VISIBILITY DISTANCES THAN THE CONVENTIONAL HEADLIGHTS; (2) WITH BOTH OPPOSING CARS USING LOW BEAM IT IS A SLIGHT ADVANTAGE TO HAVE HALOGEN HEADLIGHTS; AND (3) THE OPTIMAL DIPPING DISTANCE IS A FUNCTION OF HIGH BEAM SYSTEM (INTENSITY) RATHER THAN LOW BEAM SYSTEM. SMALL DIFFERENCES IN AIMING, ATMOSPHERE ETC. CAUSE LARGER DIFFERENCES IN VISIBILITY DISTANCES THAN DOES HEADLIGHT SYSTEM. /AUTHOR/

• Supplemental Notes:
  • Report 94, 14 PP, 5 FIG, 9 REF
• Corporate Authors:

  Uppsala University, Sweden

  Department of Psychology, Tradgardsgaten 20
  75220 Uppsala,   Sweden 
• Authors:
  • Rumar, K
• Publication Date: 1970

Subject/Index Terms

• TRT Terms: Distance; Halogens; Headlamps; High beamed headlamps; Low beamed headlamps; Visibility
• Old TRIS Terms: Dipping; High beamed headlights; Low beamed headlights
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00221257
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 25 1971 12:00AM