A six-month HSRI study examined the dynamic stability of five types of tanker trucks commonly used to transport flammable fuels in Michigan. The ad hoc research project was requested by the Governor and sponsored by the State of Michigan Office of Highway Safety Planning. The tasks included a survey of bulk fuel-delivery operations in Michigan, mathematical analyses of the stability of tanker trucks, development of experimental modifications of the least stable truck--the double-tanker commonly called the "double-bottom tanker"--and full-scale testing of modified and unmodified double-tankers. Modifications recommended for the double-tanker consist of a redesigned hitch connecting the first and second trailers and a minor modification in trailer spring assemblies. The modifications double the lateral stability of the second trailer during emergency lane changes. The cost of the modifications is estimated at $3,000 per vehicle. The major recommendation resulting from the study is that existing double-tankers be removed from the road until they can be equipped with the modified hitch and trailer springs. That retrofitting makes the 11-axle double-tanker as stable as the 6-axle short Michigan single-tanker and almost as stable as the large 11-axle Michigan single-tanker. /Author/

  • Corporate Authors:

    Highway Safety Research Institute

    Huron Parkway and Baxter Road
    Ann Arbor, MI  United States  48109
  • Authors:
    • Ervin, R D
  • Publication Date: 1978

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00184555
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Files: TRIS
  • Created Date: Feb 3 1979 12:00AM