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Title: Work Zone Lighting and Visual Performance: Analysis and Demonstration
Accession Number: 01472666
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: In part because of the potential for high levels of glare from work zone illumination, recommendations for light levels from work zone illumination systems are substantially higher than for levels used along roadways in non–work zone locations. In a two-part study, requirements for work zone illumination light levels were assessed. First, levels for workers varying in age from 20 to 60 years were evaluated with the relative visual performance model, with and without the presence of visibility-reducing glare. Except for the smallest, lowest-contrast tasks performed by the older workers, an illuminance of 10 lx resulted in visibility well above the threshold even in the presence of glare, and an illuminance of 30 lx resulted in suprathreshold visibility for these conditions as well. The results of these computational analyses were largely confirmed in a full-scale, outdoor field demonstration attended by transportation agency engineers and highway contractors. Together, the findings suggest that when lighting systems provide sufficient glare control, light levels do not always need to be especially high to ensure adequate visibility for workers.
Monograph Title: Monograph Accession #: 01501139
Report/Paper Numbers: 13-2244
Language: English
Authors: Bullough, John DBesenecker, Ute CSnyder, Jeremy DSkinner, Nicholas PPagination: pp 25–34
Publication Date: 2013
ISBN: 9780309286930
Media Type: Print
Features: Figures
(10)
; Photos; References
(18)
TRT Terms: Geographic Terms: Subject Areas: Construction; Highways; Maintenance and Preservation; Operations and Traffic Management; I85: Safety Devices used in Transport Infrastructure
Files: TRIS, TRB, ATRI
Created Date: Feb 5 2013 12:30PM
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