@article{ref1,
title="Traffic Flow Modelling and on-Ramp Optimal Control in Freeway",
journal="Zhongguo Gonglu Xuebao",
year="2000",
author="Tan, Marcus and Xu, Jianjiang and Mao, Z",
volume="13",
number="4",
pages="83-85",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1001-7372",
doi="",
url="http://dx.doi.org/"
}