ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners.
As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
The purpose of this study was to examine the relationships between the legibility of overhead signs and the brightness configurations which can result when various vehicle, sign, and roadway lighting conditions exist for a number of commonly used high type sign materials, The effects of the variables are expressed in legibility distances to enable the designer to compare the relative improvements in legibility for various sign-illumination systems.
This final report (Research Report 5-9 Final) summarizes the findings of several years of research on intersection illumination. The research was cond...
The objective of this report is to present the results of studies of operational characteristics of highway traffic moving through an intersection at ...
As an initial step in the establishment of guidelines for the use of high intensity sheeting on overhead signs, a pilot study was made to investigate ...
Research conducted recently for the United States Sign Council Foundation found no consensus in the researchliterature or the practices of the commerc...
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