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.
The randomness of accident counts
Accident Analysis and Prevention ; 18 , 3 ; 193-198
1985-04-02
6 pages
Article (Journal)
Electronic Resource
English
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