@article{ref1,
title="Evaluation of reflectorized sign sheeting for nonilluminated freeway overhead guide signs",
journal="Transportation research record",
year="1985",
author="Harmelink, M.D. and Hemsley, G. and Duncan, D. and Kuhk, R.W. and Titishov, T.",
volume="1010",
number="",
pages="80-84",
abstract="A comparative evaluation of various combinations of reflective sheeting (Level 1 = high-intensity, super-engineering grade; and Level 2 = engineering grade) on nonilluminated freeway overhead guide signs was made under road test conditions. A panel of nontechnical observers was used in a subjective evaluation of the signs. Luminance measurements were made by using a telephotometer at the front passenger's eye position using low-beam headlights together with traffic stream headlight illumination. Cost analyses were also performed. The study concluded that, pending the results of further tests on high-intensity versus super-engineering grade for sign message and border, the recommended course of action for freeway overhead guide signs was to implement high-intensity foreground (legend and border) on engineering-grade background.<p /><p>Language: en</p>",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}