@article{ref1,
title="An Ommatometric Approach to Traffic Signal Visibility",
journal="Transportation human factors",
year="1999",
author="Greenhouse, Daniel and Cohn, Theodore E.",
volume="1",
number="4",
pages="317-329",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1093-9741",
doi="10.1207/sthf0104_4",
url="http://dx.doi.org/10.1207/sthf0104_4"
}