@article{5a53768b5ade40f8a64b7f7617a0b607,
title = "Legibility of urban highway traffic signs using new retroreflective materials",
abstract = "Unlighted highway signs, which use newly developed retroreflective materials, were installed along the major expressway in an urban area by the local department of transportation. Photometric measurements of the signs were used to assess their legibility applying the relative visual performance model, in comparison to lighted signs, conforming to recommended illumination practices. Te calculated visibility of the measured unlighted signs was similar to that of the signs equipped with exterior sign illumination. Te practical significance and limitations of the relative visual performance approach are discussed.",
keywords = "Highway signs, Retroreflective materials, Visibility, Visual performance",
author = "Bullough, {John D.} and Skinner, {Nicholas P.} and O'Rourke, {Conan P.}",
note = "Funding Information: This study was funded by NYSDOT with funds from FHWA through a subcontract managed by Cornell University. Patrick Galarza was Project Manager. Valuable input was provided by Barbara Abrahamer, Cheng Chou, Pratip Lahiri, Deborah Mooney, Orlando Picoz-zi, Carlos Quiles and Richard Stempel from NYSDOT; by Emmett McDevitt, James Growney and Christine Thorkildsen of FHWA; and by Andrew Bierman, Christopher Gribbin, Mark Rea and John Van Derlofske from Rensselaer{\textquoteright}s Lighting Research Center. Stephen Israel of the Schenectady County Airport is gratefully acknowledged for allowing field measurements to be conducted on airport property.",
year = "2010",
doi = "10.3846/transport.2010.28",
language = "English",
volume = "25",
pages = "229--236",
journal = "Transport",
issn = "1648-4142",
publisher = "Vilnius Gediminas Technical University",
number = "3",
}