@article{ref1,
title="Research Needed to Keep Pace With Changing Traffic Trends",
journal="Traffic quarterly",
year="1958",
author="Normann, OK",
volume="12",
number="3",
pages="334-361",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0041-0713",
doi="",
url="http://dx.doi.org/"
}