@article{ref1,
title="Effectiveness of Traffic Control Devices in Reducing Accident Rates at Urban Work Zones",
journal="Transportation quarterly",
year="1991",
author="Garber, Nicholas and Woo, TSH",
volume="45",
number="2",
pages="259-270",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0278-9434",
doi="",
url="http://dx.doi.org/"
}