Safety Benefits of Stability Control Systems for Tractor-Semitrailers

This study was conducted by the University of Michigan Transportation Research Institute (UMTRI) under a Cooperative Agreement between the National Highway Traffic Safety Administration (NHTSA) and Meritor WABCO to examine the performance of electronic stability control (ESC) systems and roll stability control (RSC) systems for heavy-truck tractor-semitrailers. The study is based on the analysis of independent crash datasets using engineering and statistical techniques to estimate the probable safety benefits of stability control technologies for 5-axle tractor-semitrailer vehicles. The conventional approach for assessing the safety benefits of vehicle technologies is to analyze crash datasets containing data on the safety performance of vehicles equipped with the technology of interest. Because the deployment of the stability technologies for large trucks is in its infancy, national crash databases do not yet have a sufficient amount of factual data that can be directly linked to the performance of the technology. Therefore a novel method of examining the potential benefits of these systems was used. Crash scenarios that could likely benefit from the technologies were selected from national crash databases and the probable effectiveness of each technology was estimated. The analysis in this study did not have the advantage of examining representative crash datasets that contain identifiable data from vehicles equipped with the technology. Therefore, the analysis was based on probable outcome estimates derived from hardware-in-the-loop simulation, field test experience, expert panel assessment, and fleet crash data and these methods were used to estimate the safety benefits from the national crash data population.

  • Record URL:
  • Corporate Authors:

    University of Michigan Transportation Research Institute

    2901 Baxter Road
    Ann Arbor, MI  United States  48109-2150

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Woodrooffe, John
    • Blower, Daniel F
    • Gordon, Timothy J
    • Green, Paul E
    • Liu, Brad
    • Sweatman, Peter
  • Publication Date: 2009-10


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 160p

Subject/Index Terms

Filing Info

  • Accession Number: 01147321
  • Record Type: Publication
  • Report/Paper Numbers: HS-811 205
  • Contract Numbers: DTNH22-06-H-00058
  • Created Date: Dec 28 2009 9:53AM