@article{ref1,
title="Psychological factors in highway design and traffic control problems: evaluation of design data for crossover distances",
journal="Highway Research Board proceedings",
year="1941",
author="Spears, S.m. and Loutzenheiser, D.w. and Moyer, R.a.",
volume="",
number="",
pages="-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0096-1027",
doi="",
url="http://dx.doi.org/"
}