THE VARIABILITY OF ACCIDENT COUNTS

The analysis of accident count data for a number of Auckland, New Zealand intersections is described. The results reveal considerable variation in the variability of accident counts, inconsistent with the "Poisson assumption", upon which accident data analysis is generally based. The practical implications of the results and a procedure for taking proper account of variations in the variability of accident counts are discussed. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00014575
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Nicholson, A J
• Publication Date: 1985-2

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 47-56
• Serial:
  • Accident Analysis & Prevention
  • Volume: 17
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0001-4575
  • Serial URL: http://www.sciencedirect.com/science/journal/00014575

Subject/Index Terms

• TRT Terms: Crash rates; Crashes; Data analysis; Information management; Information, data, and knowledge; Intersections; Mathematical analysis; Numbers; Urban areas; Variables
• Geographic Terms: New Zealand
• Old TRIS Terms: Accident counts
• ITRD Terms: 1643: Accident; 1612: Accident rate; 6471: Analysis (math); 8555: Information documentation; 455: Junction; 8079: New Zealand; 6432: Number; 313: Urban area; 9086: Variability
• Subject Areas: Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics;

Filing Info

• Accession Number: 00396804
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: HS-038 757
• Files: HSL, ITRD, TRIS
• Created Date: Jan 31 1986 12:00AM