SAFETY PROBLEMS IN COMMERCIAL VEHICLE HANDLING

Swedish research on the dynamic behavior of heavy vehicle combinations and proposed regulations on handling performance are reviewed. Revealed safety problems are listed and some steps towards better safety are suggested. The research was concentrated on the handling performance in a double lane change maneuver studied by means of digital computer simulation. The 10 degrees-of-freedom driver- vehicle simulation model used in these studies was validated by full scale tests. Several studies on overturning stability were performed, such as: full scale static tests; lateral sloshing effects studied by means of servo-operated scale models connected to an analogue computer; studies of relations between driver estimated and calculated overturning risk in real traffic. The low speed off-tracking problem was investigated separately and its interactions with high-speed behavior is discussed. Performance criteria were chosen in close relation to accident risk. Simulation results indicate that the rearmost unit of an articulated vehicle has the highest risk factors. Some important design parameters are: number of articulations, steered axle location, tire data, geometric configuration, load condition, and roll stiffness. For road tankers with laterally sloshing liquid the overturning risk can be more than twice the risk with corresponding rigid load. Regulations were proposed on risk variable limits in different simulated maneuver. The steady-state overturning limit was proposed to be at least 4 m/s squared. /AUTHOR/

  • Supplemental Notes:
    • This report was presented at the Commercial Vehicle Braking and Handling Symposium, in Ann Arbor.
  • Corporate Authors:

    Highway Safety Research Institute

    Huron Parkway and Baxter Road
    Ann Arbor, MI  United States  48109
  • Authors:
    • STRANDBERG, L
    • Nordstrom, O
    • NORDMARK, S
  • Publication Date: 1975

Media Info

  • Features: Photos; References; Tables;
  • Pagination: 66 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00127160
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS, ATRI
  • Created Date: Jan 14 1976 12:00AM