Process for Evaluating the Impacts of Implements of Husbandry on Pavements

The configurations and weights of farm equipment, known as implements of husbandry (IoH), have changed and increased to meet the needs of the agricultural industry. Although this equipment has been designed for use primarily in farm fields, travel from farm to field often occurs on public roadways. Understanding the impact these vehicles have on public roadways is important for state agencies. It is equally, if not more, important for local government agencies since this equipment utilizes local roadways more often and their pavement structures are not typically built to the load-carrying capacity of state highways. Impacts from conventional trucks can be evaluated using equivalent single-axle loads (ESALs). However, the obvious differences between IoH equipment and conventional trucks (i.e., size, weight, configuration, tires) are not accommodated in the ESAL evaluation for pavement impacts. Therefore, there needs to be a method (i.e., calculation, coefficients, or software) by which pavement structure engineers can evaluate these vehicles for their impacts on the life of pavement structures and their service lives. The objective of this research is to define the key differences between IoH equipment and conventional trucks in order to develop a method for analyzing the impacts of IoH equipment on pavement structures and their service lives. Specifically, the method must be one that is readily relatable to pavement design engineers and utilizes readily available vehicle information. Pavement design engineers are familiar with the concept of ESALs. Development of ESAL factors for implements of husbandry would be very relatable and straightforward. Alternatively, simplified software could be used. Such software would have to produce results based on some basic, readily available inputs such as gross vehicle weight, axle weights and spacings, and tire type and pressure.


  • English


  • Status: Proposed
  • Contract Numbers:


  • Sponsor Organizations:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Hanna, Amir

  • Start Date: 20160502
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 40781

Subject/Index Terms

Filing Info

  • Accession Number: 01598471
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: 01-58
  • Files: TRB, RiP
  • Created Date: May 1 2016 2:19AM