@article{ref1,
title="Effectiveness of roadside crash countermeasures",
journal="Transportation planning and technology",
year="1983",
author="Wright, Paul H.",
volume="8",
number="3",
pages="155-159",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0308-1060",
doi="10.1080/03081068308717248",
url="http://dx.doi.org/10.1080/03081068308717248"
}