@article{ref1,
title="Traffic control device comprehension: Differences between domestic and international drivers in the USA",
journal="IATSS research",
year="2001",
author="Dissanayake, Sunanda and Lu, Jian John",
volume="25",
number="2",
pages="80-87",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0386-1112",
doi="",
url="http://dx.doi.org/"
}