@article{ref1,
title="Traffic calming: Can it be done in America?",
journal="Transportation quarterly",
year="1993",
author="Grava, S",
volume="47",
number="4",
pages="483-505",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0278-9434",
doi="",
url="http://dx.doi.org/"
}