@article{ref1,
title="Relation between the technology for road usability and road safety",
journal="Traffic sciences",
year="2020",
author="Iida, Katsuhiro",
volume="50",
number="2",
pages="3-4",
abstract="<p>[Abstract unavailable]</p> <p>Language: ja</p>",
language="ja",
issn="0288-1985",
doi="10.34398/kokaken.50.2_3",
url="http://dx.doi.org/10.34398/kokaken.50.2_3"
}