OBSTACLE VISIBILITY WITH EUROPEAN HALOGEN H4 AND AMERICAN SEALED BEAM HEADLIGHTS

IN A SERIES OF FIELD EXPERIMENTS NIGHT DRIVING VISIBILITY DISTANCES WERE MEASURED FOR EUROPEAN HALOGEN (H4) HEADLIGHTS AND AMERICAN SEALED BEAM (ASB) HEADLIGHTS FOR VARIOUS TRAFFIC SITUATIONS WITH AND WITHOUT ON-COMING VEHICLES. UNDER NORMAL ONDITIONS THE ASB HIGH BEAM WAS FOUND TO BE 15% INFERIOR AND THE ASB LOW BEAM 30% SUPERIOR. A SPECIAL GLARE EVALUATION CARRIED OUT BY PEDESTRIANS AND OPPOSING DRIVERS CLEARLY SHOWS HIGHER PERCEIVED GLARE FOR ASB. HOWEVER NO INDICATION OF REAL DISCOMFORT OR IRRITATION WAS OBTAINED. /TRRL/

• Corporate Authors:

  Uppsala University, Sweden

  Traffic Safety Research Group
  Uppsala,   Sweden 
• Authors:
  • Rumar, K
  • Helmers, G
  • Thorell, M
• Publication Date: 1973

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 46 p.
• Serial:
  • Volume: 133

Subject/Index Terms

• TRT Terms: Driving; Field tests; Glare; Headlamps; Negligence; Traffic; Visibility
• Uncontrolled Terms: Driving conditions
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; Security and Emergencies;

Filing Info

• Accession Number: 00222404
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: R & D Rept, HS-014 643
• Files: HSL, TRIS, ATRI
• Created Date: Jul 16 1974 12:00AM