Implementation and Local Calibration of the MEPDG Transfer Functions in Wyoming

The Wyoming Department of Transportation (WYDOT) currently uses the empirical American Association of State Highway and Transportation Officials (AASHTO) Design for Design of Pavement Structures as their standard pavement design procedure. WYDOT plans to transition to the Mechanistic Empirical Pavement Design Guide (MEPDG) for designing new and rehabilitated highway pavements. As a part of the transitioning process, WYDOT has sponsored an implementation project. One part of the implementation project is to verify the MEPDG global distress transfer functions and calibrate these functions to local conditions, if determined to be necessary. The Wyoming Long-Term Pavement Performance (LTPP) and non-LTPP roadway segments, as well as LTPP test sections in adjacent states were used for this verification-calibration process. As noted above, one objective of the implementation project was to verify or confirm that the MEPDG transfer functions and global calibration coefficients derived from National Cooperative Highway Research Program (NCHRP) project 1-40D reasonably predict distresses and smoothness in Wyoming. One of the tasks within this project focused on using the Wyoming LTPP test sections to confirm the applicability of the global calibration coefficients. Results from the initial verification concluded some of the transfer functions exhibited significant bias between the measured and predicted distress and require local calibration. Thus, some of the LTPP test sections in adjacent states with similar design features built in Wyoming combined with some non-LTPP roadway segments in Wyoming were used to determine the coefficients of the transfer functions to eliminate any bias between the measured and predicted distresses. This report documents the local calibration of the transfer functions using LTPP and non-LTPP roadway segments. The calibration process follows the steps presented in the 2010 AASHTO MEPDG Local Calibration Guide. Local calibration coefficients were derived to remove that bias for the rutting, fatigue cracking, and thermal cracking transfer functions of flexible pavements, and the faulting and fatigue cracking transfer functions of rigid pavements. The global coefficients of the smoothness degradation regression equation for flexible and rigid pavements were also checked for their applicability to Wyoming conditions.

  • Record URL:
  • Corporate Authors:

    Applied Research Associates, Incorporated

    100 Trade Centre Dr. Ste. 200
    Champaign, Illinois  United States  61820-7233

    Wyoming Department of Transportation

    Cheyenne, WY  United States 

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Bhattacharya, Biplab B
    • Von Quintus, Harold L
    • Darter, Michael I
  • Publication Date: 2015-11-6


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Maps; References; Tables;
  • Pagination: 72p

Subject/Index Terms

Filing Info

  • Accession Number: 01599182
  • Record Type: Publication
  • Report/Paper Numbers: FHWA 16/02F
  • Contract Numbers: RS03209
  • Created Date: May 13 2016 12:47PM