@article{ref1,
title="The Effect of Car Size on Headways in Freely Flowing Freeway Traffic",
journal="Transportation science",
year="1981",
author="Wasielewski, P.",
volume="15",
number="4",
pages="364-378",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0041-1655",
doi="",
url="http://dx.doi.org/"
}