During the on-going standardization of Adaptive Driving Beam systems, the question will be raised, to which maximum luminous intensities the eyes of oncoming road users can be exposed without impairing their vision with overdue glare. Recent experiments on glare impact of new driving beam systems revealed that the laboratory experiments on disability glare cannot be applied to real-traffic conditions by implication. This is particularly true for glare distances over 300 m. Therefore, glare tests with distances of 700 m and 1000 m have been conducted on the Universitys testing site Griesheim Air Field. The results show that the dependency on the glare angle in this study is found to be considerably lower than reported by other researchers. This fact would enable a moderate increase of light intensity towards oncoming drivers, if these are found to be at a long distance. This enables the conception of new adaptive driving beams which would have induced more glare when the traditional glare models would also apply in traffic conditions. The viewing target is presented using a DLP digital video projector. For accurate measurement of the glare illuminance at the respective subjects eye, two Gigahertz HTC-99 portable illuminance meters are used. The luminance of the Landolt ring and its surrounding (black screen) is measured using a TechnoTeam LMK 98-3 color with a calibrated 50 mm lens. All measurement equipment is calibrated and traceable to German national standards. The study is conducted with 12 subjects aged 26 to 34 years, all but one are male.
Investigations on glare impact at long distances
2009
10 Seiten, 6 Bilder, 9 Quellen
Conference paper
English
Detection Distances in the Presence of Glare
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