@article{ref1,
title="Development of the Highway Accident Hazard Index: Further discussion",
journal="Journal of transportation engineering",
year="1988",
author="Crowley, KW",
volume="114",
number="2",
pages="249-250",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0733-947X",
doi="",
url="http://dx.doi.org/"
}