The effect of width and separation in rear window defroster lines on the identification of obstacles
dc.contributor.author | Sayer, James R. | en |
dc.contributor.author | Mefford, M. L. | en_US |
dc.contributor.author | Flannagan, M. J. | en_US |
dc.contributor.author | Sivak, M. | en_US |
dc.date.accessioned | 2007-02-13T15:50:53Z | |
dc.date.available | 2007-02-13T15:50:53Z | |
dc.date.issued | 1999 | |
dc.identifier | 92115 | en |
dc.identifier.other | UMTRI-99-12 | en |
dc.identifier.other | PB99-155210 | en |
dc.identifier.uri | https://hdl.handle.net/2027.42/49399 | |
dc.description.abstract | 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 the interior rearview mirror, 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. | en |
dc.description.sponsorship | Michigan University, Ann Arbor, Industry Affiliation Program for Human Factors in Transportation Safety | en |
dc.format | 7 ref. figs. graphs. tables | en |
dc.format.extent | 21 | en |
dc.format.extent | 604959 bytes | |
dc.format.mimetype | application/pdf | |
dc.language | English | en |
dc.publisher | University of Michigan, Ann Arbor, Transportation Research Institute | en |
dc.subject.other | Rear Windows/ Backlights | en |
dc.subject.other | Defrosters/ Defoggers | en |
dc.subject.other | Backing Traffic | en |
dc.subject.other | Human Reaction Time | en |
dc.subject.other | Field of View | en |
dc.subject.other | Laboratory Experiments | en |
dc.title | The effect of width and separation in rear window defroster lines on the identification of obstacles | en |
dc.type | Technical Report | en_US |
dc.subject.hlbsecondlevel | Transportation | |
dc.subject.hlbtoplevel | Engineering | |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/49399/1/UMTRI-99-12.pdf | en_US |
dc.owningcollname | Transportation Research Institute (UMTRI) |
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