@article{ref1,
title="Speed variance, enforcement, and the optimal speed limit",
journal="Economics letters",
year="1993",
author="Graves, Philip E. and Lee, Dwight R. and Sexton, Robert L.",
volume="42",
number="2-3",
pages="237-243",
abstract="A model of the optimal speed limit is developed which explicitly recognizes the roles of average speed, speed variance, and the level of enforcement. An unusual result emerges, namely that a higher speed limit may be optimal when reducing the variance in highway speeds reduces accident externalities.<p />",
language="",
issn="0165-1765",
doi="10.1016/0165-1765(93)90068-N",
url="http://dx.doi.org/10.1016/0165-1765(93)90068-N"
}