@article{ref1,
title="A study of factors influencing traffic speeds",
journal="Highway Research Board bulletin",
year="1962",
author="Rowan, Neilon J. and Keese, Charles J.",
volume="341",
number="",
pages="30-76",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0073-2206",
doi="",
url="http://dx.doi.org/"
}