MDOT User Guide for Mechanistic Empirical Pavement Design
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Michigan DOT User Guide for Mechanistic-Empirical Pavement Design Interim Edition March 2021 CONSTRUCTION FIELD SERVICES DIVISION Engineering Preamble This manual provides guidance to administrative, engineering, and technical staff. Engineering practice requires that professionals use a combination of technical skills and judgment in decision making. Engineering judgment is necessary to allow decisions to account for unique site-specific conditions and considerations to provide high quality products, within budget, and to protect the public health, safety, and welfare. This manual provides the general operational guidelines; however, it is understood that adaptation, adjustments, and deviations are sometimes necessary. Innovation is a key foundational element to advance the state of engineering practice and develop more effective and efficient engineering solutions and materials. As such, it is essential that our engineering manuals provide a vehicle to promote, pilot, or implement technologies or practices that provide efficiencies and quality products, while maintaining the safety, health, and welfare of the public. It is expected when making significant or impactful deviations from the technical information from these guidance materials, that reasonable consultations with experts, technical committees, and/or policy setting bodies occur prior to actions within the timeframes allowed. It is also expected that these consultations will eliminate any potential conflicts of interest, perceived or otherwise. MDOT Leadership is committed to a culture of innovation to optimize engineering solutions. The National Society of Professional Engineers Code of Ethics for Engineering is founded on six fundamental canons. Those canons are provided below. Engineers, in the fulfillment of their professional duties, shall: 1. Hold paramount the safety, health, and welfare of the public. 2. Perform Services only in areas of their competence. 3. Issue public statement only in an objective and truthful manner. 4. Act for each employer or client as faithful agents or trustees. 5. Avoid deceptive acts. 6. Conduct themselves honorably, reasonably, ethically and lawfully so as to enhance the honor, reputation, and usefulness of the profession. 2 of 220 March 2021 FOREWORD This manual has been prepared to outline how the Michigan Department of Transportation (MDOT) designs the pavement cross-section according to the Mechanistic-Empirical Pavement Design Guide (MEPDG) from the American Association of State Highway and Transportation Officials (AASHTO). This manual provides guidance on utilizing AASHTO’s software package Pavement ME Design, version 2.3 to arrive at a pavement cross-section that can be utilized on MDOT pavement projects. Inquiries concerning the information presented in this manual may be directed to the individuals listed in Section 1.6 – Contacts. The manual can be downloaded from MDOT’s website: www.michigan.gov/mdot Select these headings from the navigation bar (left side of the page), in the following order: Reports, Publications and Specs Publications Manuals and Guides Under the Construction Field Services – Manuals area, select the link “Mechanistic Empirical Pavement Design user Guide” 3 of 220 March 2021 Michigan Department of Transportation (MDOT) Mechanistic Empirical Pavement Design Guide Interim Edition Table of Contents Chapter 1 – Introduction ........................................................................................................ 9 1.1 – Introduction ................................................................................................................................ 9 1.2 – Background ................................................................................................................................. 9 1.3 – Michigan ME Research .............................................................................................................. 11 1.4 – Design Types ............................................................................................................................. 13 1.5 – User Guide Layout ..................................................................................................................... 14 1.6 – Contacts .................................................................................................................................... 14 Chapter 2 – Software Operation .......................................................................................... 15 2.1 – Access ....................................................................................................................................... 15 2.2 – Help Resources ......................................................................................................................... 15 2.3 – Starting the Software ................................................................................................................ 16 2.4 – Database Access ........................................................................................................................ 17 2.5 – Multiple Options for Actions ..................................................................................................... 19 2.6 – Pavement ME Design Window................................................................................................... 19 2.6.1 – Menu Bar ................................................................................................................................................ 20 2.6.2 – Explorer Pane .......................................................................................................................................... 22 2.6.2.1 – Folder Structure ......................................................................................................................................................... 22 2.6.2.2 – Projects Folder ........................................................................................................................................................... 23 2.6.2.3 – Import/Export ............................................................................................................................................................ 24 2.6.2.4 – Project Node Color Scheme ...................................................................................................................................... 24 2.6.2.5 – Sensitivity ................................................................................................................................................................... 25 2.6.2.6 – Optimization .............................................................................................................................................................. 28 2.6.2.7 – Other Nodes ............................................................................................................................................................... 30 2.6.3 – Progress Pane.......................................................................................................................................... 34 2.6.4 – Project Tab Pane ..................................................................................................................................... 34 2.6.4.1 – Tabs............................................................................................................................................................................. 35 2.6.4.2 – General Project Information ..................................................................................................................................... 36 2.6.4.3 – Performance Criteria ................................................................................................................................................. 37 4 of 220 March 2021 2.6.4.4 – Pavement Structure................................................................................................................................................... 37 2.6.4.5 – Property Grid ............................................................................................................................................................. 39 2.6.5 – Output/Error List/Compare Pane............................................................................................................ 42 2.6.5.1 – Output Tab ................................................................................................................................................................. 42 2.6.5.2 – Error List Tab .............................................................................................................................................................. 42 2.6.5.3 – Compare Tab .............................................................................................................................................................. 43 2.7 – Screen Customization ................................................................................................................ 43 Chapter 3 – Design Process .................................................................................................. 47 3.1 – Pavement Design Steps ............................................................................................................. 47 3.1.1 – Step 1: Gathering Data ........................................................................................................................... 48 3.1.2 – Step 2: Request Traffic Information ......................................................................................................