Terry, Travis N.Gibbons, Ronald B.2013-07-252013-07-252011-12-1611-UL-016http://hdl.handle.net/10919/23325With the development of new light sources, options for the color and spectral output of a luminaire are wider than for traditional light sources. This can impact visibility as the spectral output of a light source may have a significant impact on the appearance of objects in the roadway environment. This study compares the visibility and color contrast afforded by three separate roadway luminaire types, each with a different spectral output. The benefit provided by the additional color information provided by the spectral distribution of a luminaire can improve detection of objects in the roadway by as much as 50%. These results, however, are not consistent across all spectral output and object color combinations. These results also indicate that the proper selection of a luminaire output will provide better visibility for the driver. -- Report website.ix, 57 pagesapplication/pdfenIn Copyright (InC)TE228 .T47 2011ebRoads -- Lighting -- TestingAutomobile driving at night -- TestingContrast sensitivity (Vision)Night visionColor visionReporthttp://scholar.lib.vt.edu/VTTI/reports/AssessmentImpactColorContrast_FinalReport12162011.pdf781955296