ROAD ACCIDENT DATA FOR ENGINEERING REMEDIAL WORK

This paper reviews a number of problems which have recently come to light in connection with the interpretation of road accident data, particularly the before-and-after data associated with remedial schemes. They include the "regression-to-mean" effect and "accident migration". The regression-to-mean effect is shown to be potentially more complex than originally believed, since it may apply separately to different categories of accident within the total occurring at an accident site. Suggestions are made for circumventing some (but not all) of the problems raised. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02656868
• Corporate Authors:

  INSTITUTION OF HIGHWAYS & TRANSPORTATION

  6 ENDSLEIGH STREET
  LONDON,   United Kingdom  WC1H 0DZ
• Authors:
  • WRIGHT, C C
• Publication Date: 1983-8

Media Info

• Features: Photos; Tables;
• Pagination: p. 14-17
• Serial:
  • HIGHWAYS & TRANSPORTATION
  • Volume: 30
  • Issue Number: 8-9
  • Publisher: INSTITUTION OF HIGHWAYS & TRANSPORTATION
  • ISSN: 0265-6868

Subject/Index Terms

• TRT Terms: Before and after studies; Countermeasures; Crash analysis; Crash rates; Data analysis; Evaluation and assessment; High risk locations; Improvements; Mathematical analysis; Regression analysis; Statistics; Traffic crashes
• ITRD Terms: 1663: Accident black spot; 1612: Accident rate; 9148: Before and after study; 9020: Evaluation (assessment); 9108: Improvement; 6588: Regression analysis; 6555: Statistics
• Subject Areas: Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 00384529
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: May 30 1984 12:00AM