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

USING VISIBILITY DISTANCE AS A CRITERION, HALOGEN AND CONVENTIONAL HIGH AND LOW BEAMS WERE EXPERIMENTALLY COMPARED. THE RESULTS WERE: ON HIGH BEAM WITHOUT OPPOSING LIGHT THE HALOGEN HEADLIGHTS OFFER ABOUT 25% LONGER VISIBILITY DISTANCES THAN THE CONVENTIONAL HEADLIGHTS. WITH BOTH OPPOSING CARS USING LOW BEAM THERE IS A SLIGHT ADVANTAGE (<5 M) TO HAVING HALOGEN HEADLIGHTS. 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. /HSRI/

• Supplemental Notes:
  • Rept No 94, 14 PP, FIGS, 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: Alternatives analysis; Distance; Halogens; Headlamps; High beamed headlamps; Low beamed headlamps; Visibility
• Old TRIS Terms: High beamed headlights; Low beamed headlights
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00221336
• Record Type: Publication
• Source Agency: Highway Safety Research Institute
• Files: TRIS
• Created Date: Jul 18 1971 12:00AM