Proposed Enhancements to Pavement ME Design: Improved Consideration of the Influence of Subgrade and Unbound Layers on Pavement Performance

The AASHTOWare Pavement ME Design (formerly DARWin-ME) and the AASHTO Mechanistic-Empirical Pavement Design Guide Manual of Practice (MEPDG) provide a methodology for the analysis and performance prediction of pavements and overlays. Although the performance of flexible and rigid pavements is known to be closely related to properties of the subgrade and underlying layers (i.e., base and/or subbase), some recent research studies indicated that the performance predicted by this methodology shows a low sensitivity to the properties of underlying layers and does not always reflect the extent of the anticipated effect. There is a need to evaluate the procedures contained in the Pavement Mechanistic-Empirical (ME) Design and identify or develop enhancements to ensure that the procedures appropriately account for the influence of subgrade and unbound layers on the performance of flexible and rigid pavements. These enhancements could be incorporated into the Pavement ME Design procedures to allow an improved analysis and design of flexible and rigid pavements. The objective of this research is to propose enhancements, as needed, to the Pavement ME Design procedures to better reflect the influence of subgrade and unbound layers (properties and thicknesses) on the performance of flexible and rigid pavements. These enhancements may include modifications of the models contained in the Pavement ME Design and/or the development of new models. The research shall address all types of flexible and rigid pavements included in Pavement ME Design.

Language

  • English

Project

  • Status: Active
  • Funding: $400000.00
  • Contract Numbers:

    Project 01-53

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

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

    National Cooperative Highway Research Program

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

    Hanna, Amir

  • Performing Organizations:

    Texas A&M Transportation Institute, College Station

    Texas A&M University System
    3135 TAMU
    College Station, TX  United States  77843-3135
  • Principal Investigators:

    Lytton, Robert

  • Start Date: 20141001
  • Expected Completion Date: 0
  • Actual Completion Date: 20170331
  • Source Data: RiP Project 37726

Subject/Index Terms

Filing Info

  • Accession Number: 01543612
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 01-53
  • Files: TRB, RiP
  • Created Date: Nov 19 2014 1:02AM