Change in Automobile Visibility at Dusk

概要

論文の詳細を見る
Determinants of automobile visibility include the factors peculiar to the vehicle, such as type of lamps, as well as external factors, such as change in surrounding brightness. At dawn and dusk, even if the lighting conditions caused by the vehicle's lamps remain the same, automobile visibility can be expected to change in accordance with the change in surrounding brightness.For this study, perception experiments by observers have been used to understand how visibility changes during twilight hours in the case of passenger cars and a motorcycle. In the experiments, the visibility of a passenger car with all lamps turned off is taken as the standard mean. The experiments show that, (in the case of an automobile with lamps turned on) the tendency of visibility to improve as the surroundings become darker can be quantitatively confirmed as a function of road surface luminance. Moreover, as a result of simulating perception judgments of observers by taking account of the two factors(a factor determined by surrounding brightness and one determined by automobile lights), it is possible to obtain analysis results that are quite similar to those recorded through actual evaluation.
社団法人照明学会の論文