SAFETY EXPERIENCE OF LARGE TRUCKS : AN ANALYSIS OF SAMPLE SIZE REQUIREMENTS ---PROCEEDINGS OF THE 23RD ANNUAL MEETING OF THE CANADIAN TRANSPORTATION RESEARCH FORUM, MINAKI LODGE, ONTARIO, CANADA, 24-27 MAY 1988

Considerable debate has emerged in Canada in terms of the relative safety of different configurations of heavy trucks (for example, double trailer versus single trailer, a-train versus b-train versus c-train). This paper presents an analysis of the sample size required in order to have a reasonable expectation of detecting statistically significant differences in safety experience based on actual differences in accident rates. The authors conclude that the sample required to detect even a 20% difference in accident rates is beyond the size that could be reasonably undertaken in Canada. Further, the study suggests that conclusions drawn fromn smaller samples are at best questionable unless the difference in accident experience in large (greater than 20% difference). For the covering abstract of the conference see IRRD 807127.

  • Availability:
  • Corporate Authors:

    CANADIAN TRANSPORTATION RESEARCH FORUM

    P.O. BOX 577
    Moncton, NB,   Canada 
  • Authors:
    • Sparks, G A
    • Horosko, A T
    • Smith, A
  • Publication Date: 1988

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00487251
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1989 12:00AM