The study was designed to determine the crash likelihood of drivers in Michigan as a function of two independent variables: driver age and driving experience. The age variable had eight levels (18, 19, 20, 21, 22, 23, 24, and 25 years old) and the experience variable had two levels (one and two years of experience). The dependent variable was the annual number of crashes per person. The results showed that for drivers with one year of experience the crash rate declined generally between the ages of 18 and 23, with an upturn at age 22. The average crash rates then leveled off between the ages of 23 and 25. This finding suggests that the youth-related factors in crash involvement decline up to about age 23. For drivers with two years of experience, the crash rates declined up to about age 21, then increased slightly for the rest of the ages studied. Finally, crash rates for drivers with two years of experience were significantly higher for the 23, 24, and 25-year-olds than the rates for drivers with one year of experience in the same age groups.

  • Record URL:
  • Corporate Authors:

    University of Michigan Transportation Research Institute

    2901 Baxter Road
    Ann Arbor, MI  United States  48109-2150
  • Authors:
    • Eby, D W
  • Publication Date: 1995-5


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 15 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00724863
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: UMTRI-95-14, HS-042 105
  • Files: HSL, TRIS, USDOT
  • Created Date: Aug 14 1996 12:00AM