Vehicle Stability and Dynamics: Longer Combination Vehicles

As part of its ongoing effort to improve the safety, security, and operational efficiency of heavy commercial vehicles, the National Transportation Research Center, Incorporated (NTRCI) has begun to investigate the stability of Longer Combination Vehicles. (LCVs), known colloquially as "doubles" or "triples" have more complicated dynamics than the more common tractor in combination with a single semitrailer. The goal of the phase conducted in 2011 is to measure and model the behavior of LCVs in simple maneuvers. Two parallel but independent models of LCVs are being developed. One model is based on TruckSim®, a lumped parameter model widely used for single semitrailer combinations. The other model is being developed in Adams, which more explicitly models the geometry of the components of the vehicle. These models will describe an actual LCV triple combination. They begin with its geometry and compliance measured when it is stationary. The models will be refined by comparison with dynamic data. The test vehicle will drive in a steady state straight path and constant curvature and execute single and double lane changes on a test track. Limited driving on a highway will add further representative conditions for the data. The maneuvers in this phase will not be near the limits of stability, so the data will be suitable for verifying the models only in everyday conditions. Plans calls for the models to be extended in future phases and serve as the basis for evaluating means of improving LCV stability through electronics and design features.


  • English


  • Status: Active
  • Contract Numbers:



  • Sponsor Organizations:

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue
    Washington, DC  United States  20590
  • Project Managers:

    Spezia, Anthony

  • Performing Organizations:

    Silver Eagle

    Portland, OR  United States 

    Bishop Consulting

    Auburn, AL  United States 


    8509 Mason's Pond Drive
    Colfax, NC  United States  27235

    Michelin Amercia Research & Development Corporation

    PO Box 1987
    Greenville, SC  United States  29602-1987

    Auburn University

    National Center for Asphalt Technology
    310 Sanford Hall
    Auburn, Alabama  United States  36849-5131

    University of Akron

    Akron, OH  United States 

    Western Michigan University

    1903 W. Michigan Avenue
    Kalamazoo, MI  United States  49008-5241

    Oak Ridge National Laboratory

    Post Office Box X
    Oak Ridge, TN  United States  37831

    Clemson University

    Box 345702, Room 300, Brackett Hall
    Clemson, SC  United States  29634
  • Start Date: 20110101
  • Expected Completion Date: 0
  • Actual Completion Date: 20110930
  • Source Data: RiP Project 28158

Subject/Index Terms

Filing Info

  • Accession Number: 01463665
  • Record Type: Research project
  • Source Agency: National Transportation Research Center, Incorporated
  • Contract Numbers: DTRT-06-G-0043, U32
  • Files: UTC, RiP, USDOT
  • Created Date: Jan 3 2013 2:28PM