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

Media Info

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

Subject/Index Terms

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