@article{ref1,
title="Research on the Relationship Between Discrete Character of Speed and Traffic Accident and Speed Management of Freeway",
journal="Zhongguo Gonglu Xuebao",
year="2004",
author="Pei, YL and Cheng, GZ",
volume="17",
number="1",
pages="74-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1001-7372",
doi="",
url="http://dx.doi.org/"
}