DEVELOPMENT OF TECHNIQUES FOR INVESTIGATING ACCIDENT CAUSATION

Distributions of understeer coefficients and steering sensitivities are computed for (1) an OE vehicle population, (2) an at-risk vehicle population, and (3) an accident-involved vehicle population to determine if these vehicle handling parameters could be influential in accident causation. The infleunces of in-use tire factors (inflation pressure and tread depth) and in-use loading conditions (as reflected by number of occupants) upon understeer and steering sensitivity are reflected in the distributions calculated for the at-risk and accident-involved populations. It is concluded that no differences of any consequence exist between the distributions of either understeer or steering sensitivity as calculated for the at-risk and accident-involved vehicle populations. This conclusion is qualified by the following points (1) knowledge of the effects of inflation pressure and tread depth on tire stiffness properties is imprecise, (2) the effects of mixing of tire sizes and constructions on understeer and steering sensitivity in the at-risk population is ignored, and (3) the sample of accident vehicles is somewhat small (a total of 218 vehicles). /Author/

  • Supplemental Notes:
    • Sponsored by the Motor Vehicle Manufacturers Association, Detroit, Michigan.
  • Corporate Authors:

    Highway Safety Research Institute

    Huron Parkway and Baxter Road
    Ann Arbor, MI  USA  48109
  • Authors:
    • Johnson, L
    • SEGEL, L
  • Publication Date: 1978-1

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 90 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184562
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Report/Paper Numbers: Rpt No. UM-HSRI-78-4Final Rpt.
  • Contract Numbers: 361283
  • Files: TRIS
  • Created Date: Feb 3 1979 12:00AM