TY  - JOUR
PY  - 1986//
TI  - The randomness of accident counts
JO  - Accident analysis and prevention
A1  - Nicholson, A. J.
SP  - 193
EP  - 198
VL  - 18
IS  - 3
N2  - 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.
LA  - en
SN  - 0001-4575
UR  - http://dx.doi.org/
ID  - ref1
ER  -