MEPDG Local Calibration

The Missouri Department of Transportation (MoDOT) has always relied on sound engineering for designing new and rehabilitated pavements. The current design approach is the Mechanistic-Empirical Pavement Design Guide (MEPDG), developed under a series of National Cooperative Highway Research Projects (NCHRP). The MEPDG utilizes existing state-of-the-practice mechanistic-based pavement analysis and distress prediction algorithms. Enough time has elapsed to perform a second local calibration cycle. During this interim period, more performance data has been collected from the original field test sections. In addition, newer models have been introduced to the American Association of State Highway and Transportation Officials (AASHTO) Pavements ME Design Guide software that requires a first local calibration. Greater emphasis will be placed on the rehabilitation models. Objectives are as follows: (1) Perform a second local calibration of distress prediction models for existing field test sections; (2) Supplement existing test sections with additional rehabilitation pavement sections; (3) Perform a first local calibration of newer prediction models in the AASHTO Pavement ME Design Program; (4) Update the materials database library with contemporary pavement materials properties, including reclaimed materials; and (5) Fully document the local calibration work, including clear guidance for changing calibration coefficients. Update the user manual. Provide recommendations and precise details of any suggested /incorporated changes. Quarterly Progress (Jan-Mar 2016): January 19th, the request for proposal (RFP) proposal review panel met and decided to award the contract to RAO Consulting. January 21st, RAO Consulting was notified of the awarded contract via acceptance letter. February 5th, RAO Consulting submitted their proposed work plan, schedule and budget. February 18th, the Standard Research Agreement was drafted and mailed to RAO Consulting and all documents signed and returned by RAO Consulting on March 4th. February 19th the Worker Eligibility Affidavit was sent to RAO and returned on February 24th. March 1st the Missouri Highways and Transportation Commission (MHTC) Contract Submittal Form was executed. March 7th, final completion and execution of the Standard Research Agreement Contract. RAO Consulting was notified via Contract Support letter. Kick-off Meeting between RAO Consulting and MoDOT took place at the Central Laboratory on March 31st. Quarterly Progress (Apr-Jun 2016): ARA submitted their Data Management Plan to MoDOT during the quarter. The PI has collected several pieces of information/data gathering (Subtask 1.2), these include pavement types to be used in the calibration, HMA mix designs and a list of potential projects for use in calibration to name a few. The PI has developed a field test plan for HMA pavements.