COMPARISON OF CALIFORNIA ACCIDENT RATES FOR SINGLE AND DOUBLE TRACTOR-TRAILER COMBINATION TRUCKS

This report provides a comparison of the relative safety of two types of truck combination vehicles, singles and doubles. The single referred to in this report is a tractor unit attached to a semi-trailer, and the double analysed consists of a tractor, semi-trailer, and full trailer, in that order. 1974 accident data for California, the state having the closest to a 50-50 split between the two truck classifications, was combined with estimates of truck exposure to arrive at accident and injury rates based on vehicle miles of travel. Also, estimates of average cargo weights were determined to evaluate the safety of the two vehicles on the basis of cargo ton-miles of travel. The results of the analysis show that doubles resulted in more fatalities per million vehicle miles of travel, but that singles had higher accident rates on the basis of cargo ton-miles of travel. (FHWA)

  • Corporate Authors:

    Biotechnology, Incorporated

    3027 Rosemary Lane
    Falls Church, VA  United States  22042

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Yoo, C S
    • REISS, M L
    • McGee, H W
  • Publication Date: 1978-3

Media Info

  • Pagination: 70 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00335963
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-78- 94 Final Rpt., HS-026 737
  • Contract Numbers: DOT-FH-11-8835
  • Files: TRIS, USDOT
  • Created Date: Dec 22 1989 12:00AM