Review of Canadian Experience with Large Commercial Motor Vehicles

Interest is building across the United States in allowing heavier and larger commercial vehicles across the national road network. By 2009 at the latest, the U.S. Department of Transportation (DOT) and American Association of State Highway and Transportation Officials (AASHTO) will want to be in a position to advise the Administration and Congress on whether or not there should be changes to the current federal size and weight provisions. Canada offers a readily available source of data and insight into the impacts of allowable (non permit) vehicle size and weight limits that are greater than those allowed nationally in the United States today. Furthermore, the unique process used in Canada for the national harmonization of truck size and weight limits in the 1980s will provide considerable insight to policy makers who are evaluating changes to truck regulations in the United States. Mexico also allows commercial motor vehicles that are larger and heavier than those in the United States to operate on federal highways, and the Mexican experience could be the subject of a subsequent research phase. The objective of this study is to review and summarize the most current information on the Canadian experience with the changes in truck size and weight limits and to evaluate the potential applicability of this experience to size and weight limits in the United States.


  • English


  • Status: Completed
  • Contract Numbers:

    Project 8-63

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway & Transportation Officials

    444 North Capitol Street, NW, Suite 225
    Washington, DC    20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  USA  20001
  • Project Managers:

    Hedges, Christopher

  • Performing Organizations:

    Regents of the University of Michigan, Ann Arbor

    Wolverine Tower, Room 1038
    3003 South State St
    Ann Arbor, MI  USA  48109
  • Principal Investigators:

    Woodrooffe, John

  • Start Date: 20070328
  • Actual Completion Date: 20100430
  • Source Data: RiP Project 16229

Subject/Index Terms

Filing Info

  • Accession Number: 01464641
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 8-63
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:46PM