@article{ref1,
title="The randomness of accident counts",
journal="Accident analysis and prevention",
year="1986",
author="Nicholson, A. J.",
volume="18",
number="3",
pages="193-198",
abstract="Road accident occurrence is generally assumed to be governed by a random process. Experience analysing accident count series indicates a need for testing the randomness of such a series, and a simple statistical test is described. The test is a modified one-sample runs test, which can be used to assist the identification of three distinct patterns constituting non-randomness (namely, a trend, a discontinuity and over-correction). The test is designed for the preliminary analysis of accident count data, and its use is demonstrated, using both artificial and actual accident count series.",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}