Illinois Flexible Pavement Design and Monitoring

Upon completion of Illinois Center for Transportation (ICT) and Illinois Department of Transportation (IDOT) project R27-233, IDOT will have more insight into the material properties of modern hot-mix asphalt (HMA) binder course (IL-19.0) materials, building on previous ICT projects which indicated low modulus and fatigue endurance limits being used in IDOT full-depth HMA pavement design procedures. However, new challenges have been added which throw these findings into question in terms of how they are implemented into pavement design frameworks. The objectives of this research are as follows: draft proposed updates to IDOT Bureau of Design and Environment (BDE) Chapter 54 and Bureau of Local Roads & Streets (BLRS) Chapter 44 to include the findings from R27-233; evaluate IDOT’s “extended life” fatigue section performance over the last 20 years; examine the impact of platooning-level rest periods and increased axle loads on HMA fatigue and integrate this into design recommendations; determine the impact of complete and partial saturation of HMA lower binder mixes on their fatigue life and dynamic modulus; evaluate the impact of hydrated lime on mixture behavior and pavement performance including moisture resistance; conduct an analysis of the effect of uncertainty related to dynamic modulus; develop a structural testing and analysis framework for traffic speed deflectometer data collected in the future; monitor and analyze data related to recent and ongoing projects in Illinois; and recommend similar procedures to those developed in R27-233 for conventional flexible pavements to supplement those developed for full-depth asphalt pavements.


    • English


    • Status: Active
    • Funding: $400000
    • Contract Numbers:


    • Sponsor Organizations:

      Illinois Department of Transportation

      Bureau of Materials and Physical Research
      126 East Ash Street
      Springfield, IL  United States  62704-4766
    • Managing Organizations:

      University of Illinois, Urbana-Champaign

      Illinois Center for Transportation
      1611 Titan Drive
      Rantoul, IL  United States  61866
    • Principal Investigators:

      Hajj, Ramez

      Thompson, Marshall

    • Start Date: 20240701
    • Expected Completion Date: 20270630
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01923519
    • Record Type: Research project
    • Source Agency: Illinois Department of Transportation
    • Contract Numbers: R27-267
    • Files: RIP, STATEDOT
    • Created Date: Jul 1 2024 12:28PM