VISIBILITY FROM MOTOR VEHICLES. IMPROVEMENT OF CAR SIGHT CONDITIONS AS A PRIORITY - REPORT OF A COLLOQUIUM

SICHT AUS KRAFTFAHRZEUGEN. VERBESSERUNG DER PKW-SICHTVERHAELTNISSE VORRANGIG - BERICHT VON EINEM KOLLOQUIUM

Extensive studies have shown that many car drivers have insufficient visual capacity, particularly when driving at night. For example 54 percent of the 70-79 year old car drivers are no longer fit to drive at night. Vision tests carried out by the Tuev Rhineland result in about 7 percent of driving licence applicants being sent to the optician for spectacles. The Tuev Rhineland has developed an apparatus for measuring the restriction in visual field caused by different spectacles. Positive results have followed the measure introduced in Sweden in 1977, that all vehicles must be driven with dipped headlights even during daylight. The following parameters affect the vision of drivers in darkness: carriageway luminance, intensity of lighting ahead of the vehicle and at the side of the carriageway, and intensity of lighting through the headlamps of oncoming vehicles. Efforts to influence visibility by means of tinted windscreens have shown that clear bonded safety glass windscreens let through 91 percent of the light. With tinted windscreens it is only 81 percent. The more the windscreen is tilted, the more unfavourable is the transmission of light. Efforts to save energy affect the aerodynamic shape of vehicle structures more than hitherto, but one result of this is that the very inclined front windscreens bring out a number of physical drawbacks: reduced light transmission, distortions and reflections. (TRRL)

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  • Corporate Authors:

    VDI Nachrichten

    Postfach 1139, Graf-Recke-Strasse 84
    4 Dusseldorf 1,   Germany 
  • Authors:
    • Muckelberg, E
  • Publication Date: 1980

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00330705
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM