@article{ref1,
title="Report of project committee on sequence and overlapping of amber indication in traffic control signals",
journal="Highway Research Board proceedings",
year="1940",
author="van Duzer, W.a.",
volume="",
number="",
pages="-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0096-1027",
doi="",
url="http://dx.doi.org/"
}