Effects of Mounting Height, Offset Distance, and Number of Light Towers on Drivers' Visual Performance and Discomfort Glare in Work Zones

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dc.contributor.authorBhagavathula, Rajaramen
dc.contributor.authorGibbons, Ronald B.en
dc.date.accessioned2020-05-21T18:57:01Zen
dc.date.available2020-05-21T18:57:01Zen
dc.date.issued2018-12-01en
dc.date.updated2020-05-21T18:56:58Zen
dc.description.abstractPortable light towers are a significant source of glare to motorists entering a work zone. Although existing research has evaluated the effect of light tower orientation on visibility and glare, the effects of factors like mounting height, offset distance from the roadway, and number of light towers in the work zone, on visual performance and discomfort glare is not known. Understanding these relationships can help in developing illuminating guidelines for work zones that can reduce glare for drivers. The goal of this paper is to understand the effect of mounting height, offset distance to the roadway, and number of light towers in the work zone on drivers’ visual performance and discomfort glare. Participants drove through a realistic work zone and evaluated portable light towers in varying mounting heights, offset distances, and number of light towers in the work zone. Results showed that the mounting height and offset distances play a critical role in affecting the driver’s visual performance and discomfort glare rating. Portable light towers, irrespective of wattage and lumen output, at lower than a mounting height of 20 ft and closer to the roadway result in decreasing driver visual performance and increasing their discomfort glare. Portable light towers should be mounted at a height of at least 20 ft and balloon light towers with higher wattage (4,000 W and greater) and lumen output (400,000 lumens and greater) should be located at an offset distance of at least 10 ft from the roadway.en
dc.description.versionPublished versionen
dc.format.extentPages 105-112en
dc.format.extent8 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1177/0361198118782762en
dc.identifier.eissn2169-4052en
dc.identifier.issn0361-1981en
dc.identifier.issue16en
dc.identifier.orcidGibbons, Ronald [0000-0002-4457-2444]en
dc.identifier.orcidBhagavathula, Rajaram [0000-0002-1119-8169]en
dc.identifier.urihttp://hdl.handle.net/10919/98519en
dc.identifier.volume2672en
dc.language.isoenen
dc.publisherSAGEen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000466871900010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectEngineering, Civilen
dc.subjectTransportationen
dc.subjectTransportation Science & Technologyen
dc.subjectEngineeringen
dc.subject0905 Civil Engineeringen
dc.subject1205 Urban and Regional Planningen
dc.subject1507 Transportation and Freight Servicesen
dc.subjectLogistics & Transportationen
dc.titleEffects of Mounting Height, Offset Distance, and Number of Light Towers on Drivers' Visual Performance and Discomfort Glare in Work Zonesen
dc.title.serialTransportation Research Recorden
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
pubs.organisational-group/Virginia Tech/University Research Institutesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/University Research Institutes/Virginia Tech Transportation Instituteen
pubs.organisational-group/Virginia Techen

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