THE RANDOMNESS OF ACCIDENT COUNTS
Road accident occuurrence 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 3 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.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00014575
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Corporate Authors:
Pergamon Press, Incorporated
Headington Hill Hall
Oxford OX30BW, -
Authors:
- Nicholson, A J
- Publication Date: 1986-6
Media Info
- Features: Figures; Tables;
- Pagination: p. 193-198
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Serial:
- Accident Analysis & Prevention
- Volume: 18
- Issue Number: 3
- Publisher: Elsevier
- ISSN: 0001-4575
- Serial URL: http://www.sciencedirect.com/science/journal/00014575
Subject/Index Terms
- TRT Terms: Statistical analysis; Stochastic processes; Traffic crashes
- Subject Areas: Data and Information Technology; Safety and Human Factors;
Filing Info
- Accession Number: 00495936
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: HS-039 960
- Files: HSL, USDOT
- Created Date: Aug 31 1990 12:00AM