A study of future headlamp design requirements based on the predicted trends in vehicles, drivers and traffic to 1990 shows the need for improvements beyond those obtainable from current, normal, unpolarized types, particularly if road speeds above 55 mph are again authorized. A cost-benefit analysis of the nationwide adoption of polarized headlighting by 1990 shows benefits, in the avoidance of nighttime accidents, in the range of 2.5 to 3.8 to 1 over the costs of implementing polarization. An on-the-road field test with twenty average drivers and ten vehicles equipped with polarized headlights, showed that distances at which low reflectivity roadside targets could be detected improved with increased polarized light output from the headlamps (higher transmission polarizers) but were relativly little affected by analyzer (viewer) transmission characteristics. (Hannebauer)
Headlight requirements in 1990 - cost-benefits and minifield trial of polarized headlights
Anforderungen an Fahrzeugscheinwerfer im Jahr 1990. Kosten-Nutzen-Analyse und Feldtest von Scheinwerfern mit polarisiertem Licht
US Government Reports ; 1-130
1976
130 Seiten
Report
Englisch
HALOGEN INCANDESCENT BULB FOR VEHICLE HEADLIGHTS AND VEHICLE HEADLIGHT
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