United States Department of Transportation
i
Use of high intensity reflective sheeting in lieu of external lighting of overhead roadway signs : [summary].
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2013-06-01
[PDF-385.51 KB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-SAFETY AND SECURITY-Highway Safety;
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Abstract:Integral to every road are signs that provide essential information to drivers. The design of signs is the result of careful study from every viewpoint, including sign position, size, shape, color, background, and lettering. Also well studied are vehicle geometries, drivers’ natures, and sign setting. Sign visibility at night is critical, especially for drivers with diminished night vision, so signs are often lighted, but new retroreflective materials which are more visible at greater distances bring the need for lighting into question. Several states have moved away from lighting to building signs with the latest reflective materials. Therefore, the Florida Department of Transportation (FDOT) engaged University of North Florida researchers to study whether high intensity reflective sheeting can replace sign lighting.
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