Show simple item record

The effect of width and separation in rear window defroster lines on the identification of obstacles

dc.contributor.authorSayer, James R.en
dc.contributorMefford, M. L.en
dc.contributorFlannagan, M. J.en
dc.contributorSivak, M.en
dc.date.accessioned2007-02-13T15:50:53Z
dc.date.available2007-02-13T15:50:53Z
dc.date.issued1999
dc.identifier92115en
dc.identifier.otherUMTRI-99-12en
dc.identifier.otherPB99-155210en
dc.identifier.urihttps://hdl.handle.net/2027.42/49399
dc.description.abstractA 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.sponsorshipMichigan University, Ann Arbor, Industry Affiliation Program for Human Factors in Transportation Safetyen
dc.format7 ref. figs. graphs. tablesen
dc.format.extent21en
dc.format.extent604959 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen
dc.publisherUniversity of Michigan, Ann Arbor, Transportation Research Instituteen
dc.subject.otherRear Windows/ Backlightsen
dc.subject.otherDefrosters/ Defoggersen
dc.subject.otherBacking Trafficen
dc.subject.otherHuman Reaction Timeen
dc.subject.otherField of Viewen
dc.subject.otherLaboratory Experimentsen
dc.titleThe effect of width and separation in rear window defroster lines on the identification of obstaclesen
dc.typeTechnical Reporten_US
dc.subject.hlbsecondlevelTransportation
dc.subject.hlbtoplevelEngineering
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/49399/1/UMTRI-99-12.pdfen_US
dc.owningcollnameTransportation Research Institute (UMTRI)


Files in this item

Show simple item record

Accessibility: If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.