@article{ref1,
title="The effect of pneumatic road tubes on vehicle speeds",
journal="Traffic safety research review",
year="1961",
author="Crowther, Richard F. and Schumate, R. P. and Smith, Ruth D.",
volume="5",
number="3",
pages="8-11",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0564-0741",
doi="",
url="http://dx.doi.org/"
}