@article{ref1,
title="Perception-response time to unexpected roadway hazards",
journal="Human factors",
year="1986",
author="Sivak, Michael and Olson, Paul L.",
volume="28",
number="1",
pages="91-96",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}