@article{ref1,
title="Traffic signal warrants -- time for a change?",
journal="ITE journal",
year="1981",
author="Clement, J.",
volume="51",
number="6",
pages="69-71",
abstract="A methodology for summation of critical movements described was used to determine signalization warrants and to provide a more accurate signal warrant system by using service level calculations.<p />",
language="",
issn="0162-8178",
doi="",
url="http://dx.doi.org/"
}