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.

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,    
  • Authors:
    • Nicholson, A J
  • Publication Date: 1986-6

Media Info

Subject/Index Terms

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