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原文传递 The Effect of Width and Separation in Rear Window Defroster Lines on the Identification of Obstacles

题名：	The Effect of Width and Separation in Rear Window Defroster Lines on the Identification of Obstacles
作者：	James R. Sayer, Mary Lynn Mefford, Michael J. Flannagan, Michael Sivak
关键词：	backing, backlight, defogger, electrical circuit, obstacle identification, rake angle, rear window, reversing, visibility
摘要：	A Static, indoor study was conducted to assess the effects of rear window defroster/defogger line width and separation on the identification of obstacles located to the rear of a motor vehicle. Additional independent variables included participant age, rake angle of the rear window, and target location in the rearward field of view. The targets used in this simulated backing/reversing task, as seen through die interior rearview minor, were a trash can (low contrast) and a child’s bicycle (high contrast). The dependent variables were reaction time to correctly identify the target, and subjective ratings of how easily targets could be seen through the simulated defroster/defogger line patterns There were two main findings. First, neither the width nor separation of the opaque lines affected participant reaction time to correctly identify a target, even when the percentage of the rearward view that was obscured by the lines reached 50%. Second, subjective ratings of the ease with which targets could be seen were significantly affected by both the width and separation of the defroster/defogger lines. These results suggest that drivers will object to the increased width and decreased separation of lines before target identification is significantly affected.
报告类型：	科技报告