@article{ref1,
title="Calculation of signal settings to minimise delay at a junction",
journal="Transportation and traffic theory",
year="1987",
author="Heydecker, B. and Dudgeon, I.",
volume="12",
number="",
pages="159-178",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}