@article{ref1,
title="Evaluation of icy bridge warning signs",
journal="Traffic engineering",
year="1975",
author="Hanscom, FR",
volume="45",
number="9",
pages="17-20",
abstract="It is emphasized that the credibility of warning devices represents a critical research need. The purpose of the work described is the development of effective signing to warn motorists of icy bridge hazards.   <p>Language: en</p>",
language="en",
issn="0041-0675",
doi="",
url="http://dx.doi.org/"
}