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dc.contributor.authorSayer, J. R.en
dc.contributorMefford, M. L.en
dc.date.accessioned2007-02-13T21:43:24Z
dc.date.available2007-02-13T21:43:24Z
dc.date.issued2000
dc.identifier94052en
dc.identifier.otherUMTRI-2000-35en
dc.identifier.otherPB2001-100510en
dc.identifier.urihttps://hdl.handle.net/2027.42/49418
dc.description.abstractA static field study was conducted, both during the day and at night, to examine the effect that color contrast within a safety vest has on noticeability. Fluorescent orange and yellow fabrics were matched with orange, yellow, silver, or white retroreflective trim to appear similar to a safety vest. The method of paired comparisons was used to develop a linear scale of how noticeable the various color combinations appeared under cluttered and uncluttered viewing conditions. The results indicate that color contrast within the safety vest, as well as relative to the environmental surround, affects judgments of noticeability. However, in the nighttime condition color contrast was not an identifiable attribute, as all the retroreflective materials used appeared white when illuminated. In the nighttime condition, the luminance of the retroreflective trim accounted for almost all of the variance in the noticeability judgments. The results of this study suggest that a design for safety apparel that includes a combination of fluorescent yellow and fluorescent orange fabrics (providing color contrast for the daytime) with silver/white micro-prismatic retroreflective trim (proving high luminance for nighttime) is likely to be the most noticeable combination in both daytime and nighttime conditions.en
dc.description.sponsorshipMichigan University, Ann Arbor, Industry Affiliation Program for Human Factors in Transportation Safetyen
dc.format21 ref. col. charts. figs. graphs. tablesen
dc.format.extent33en
dc.format.extent213484 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen
dc.publisherUniversity of Michigan, Ann Arbor, Transportation Research Instituteen
dc.subject.otherConstruction Zonesen
dc.subject.otherProtective Clothingen
dc.subject.otherNighttimeen
dc.subject.otherColor/ Chromaticityen
dc.subject.otherOptical Contrast/ Conspicuityen
dc.subject.otherLuminescence/ Fluorescenceen
dc.subject.otherReflectance/ Absorptivity/ Reflectivityen
dc.subject.otherField Experimentsen
dc.subject.otherOptical Measurements/ Photometryen
dc.titleThe effect of color contrast on daytime and nighttime conspicuity of roadworker vestsen
dc.typeTechnical Reporten_US
dc.subject.hlbsecondlevelTransportation
dc.subject.hlbtoplevelEngineering
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/49418/1/UMTRI-2000-35.pdfen_US
dc.owningcollnameTransportation Research Institute (UMTRI)


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