Rensselaer Polytechnic Institute Professor Publishes Sign Visibility Annotated Bibliography

John D. Bullough, Ph.D, Rensselaer Polytechnic Institute's Lighting Research Center, has published an annotated bibliography of sign visibility, legibility and conspicuity research in the June 2017 Interdisciplinary Journal of Signage and Wayfinding, which is published by the Academic Advisory Council for Signage Research and Education (AACSRE).  

This paper summarizes published research studies, technical reports and codes and standards related to the visibility (i.e., conspicuity and legibility) of signage. Publications are grouped and discussed according to myriad topics. First, the typographic and symbolic characteristics of signs and the information they carry are described (e.g., letter size, font selection, etc.); second, photometric, colorimetric and temporal properties of signs as they affect visibility; finally, environmental considerations (e.g., daytime versus nighttime viewing, whether a sign is located in a rural or urban area, etc.) as they influence sign design are reviewed. Annotated summaries of each publication in the literature review are included at the end.

To read the entire paper, go to