@article{ref1,
title="Emerging Trends in Roadway Transport and Their Impact on Highway Safety",
journal="Transportation quarterly",
year="1993",
author="Ranney, Thomas A. and Simmons, Leigh Ann",
volume="47",
number="4",
pages="561-582",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0278-9434",
doi="",
url="http://dx.doi.org/"
}