The purpose of this study was to define the relationship between sign luminance and legibility that would assist in selecting optimum material choices for various signing application as well as aid in decisions concerning maintenance and replacement.
Chapel Hill, NC, University of North Carolina UNC, Highway Safety Research Center HSRC, 1977, XII + 239 p., fig., graph., tab., ref.; UM-HSRI-77-6.
This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.