Quantifying the Impact of Super Single (Wide Base) Tires on Pavement Damage in Michigan

Dual tires have been the trucking industry standard for many decades. For this reason, existing modelling of the stresses imparted to the pavement through the tires is based on dual tires. However, the freight industry has started to use wide-base single tires, also known as super single tires (SST) because of their economic benefits and safety advantages. Therefore, SSTs may gradually replace conventional dual tires. Early design types of SSTs induced excessive pavement damage, especially to flexible pavements. These types of SSTs can generate much higher vertical contact stresses as compared to traditional dual tires, resulting in more significant deformations and more severe damage in bound and unbound layers within a pavement structure. Subsequently, the latest generation of SSTs now have contact areas that are like traditional dual tires and potentially offer improved performance. Therefore, these SSTs would inflect less bottom-up cracking in the asphalt concrete layer and less permanent deformation in all pavement layers. It is not clear what effect SSTs have on dynamic loading when the pavement surface exhibits high surface roughness, (measured in terms of the International Roughness Index (IRI)). Moreover, weight measurements obtained by roadway Weigh-in-Motion (WIM) sensors may have errors as compared to the actual axle load for such tires. Therefore, there is a need to investigate the impact of such wide-based tires on pavement performance for Michigan’s climate and construction practices, identifying the impacts that these have on the current MDOT flexible and rigid pavement design methods. For example, the presence of SSTs may influence the axle load spectra (ALS) to be used in ME analysis and load equivalency factors (LEF) for the AASHTO design method.


  • English


  • Status: Completed
  • Contract Numbers:

    2019‐0311 Z2

  • Sponsor Organizations:

    Michigan Department of Transportation

    Van Wagoner Building
    425 W. Ottawa Street
    Lansing, MI  United States  48909
  • Start Date: 20210315
  • Expected Completion Date: 20220531
  • Actual Completion Date: 0

Subject/Index Terms

  • TRT Terms: Tires
  • Subject Areas: Pavements;

Filing Info

  • Accession Number: 01774502
  • Record Type: Research project
  • Source Agency: Michigan Department of Transportation
  • Contract Numbers: 2019‐0311 Z2
  • Files: RIP, STATEDOT
  • Created Date: Jun 21 2021 10:51AM