As with other pavement design methods, close attention must be paid to the local calibration of variables within mepdg software to ensure that roads. Aashtoware pavement me design aashtoware pavement me design v2. Introduction to mepdg flexible pavement design 3 pdhs. The mepdg is designed to update the 1993 aashto guide for design of pavement structures, which is primarily based on empirical observations from the. Pavement designanalysis software university of idaho. The mechanisticempirical pavement design guide mepdg, as it has now become known, was com.
Mechanisticempirical pavement design guide, mepdg, pavement design, calibration, materials tests, traffic data, acceptance, deployment 18. Fulldepth pavement constructed on subgrade deepstrength pavement constructed on thin granular base course aka extendedlife pavement or longlife pavement. Key words mechanistic empirical pavement design, pavement performance, hot mix asphalt, jointed concrete. Nchrp 7a pavement design guide mepdg introductory workshop. The objectives of project 140d01 were to 1 work in coordination with the contractor for project 140d02 to produce improved, corrected versions 0. Aashtoware pavement me software where does vdot use mepdg. This clip introduces where and how to install mepdg and some instructions about climate settings. Why do we need a new pavement design proceduressoftware. The online version of the mechanisticempirical pavement design guide is available. Implementation of the aashto mechanisticempirical pavement design guide and software. Crcp performance problems observed in the past,such as material durability, base erosion, steel. Management information system pmis with respect to the input information required for mechanisticempirical pavement design guide mepdg rehabilitation analysis and design. Consideration of preservation in pavement design and.
It is strongly encouraged this memo is read prior to downloading or viewing mechanisticempirical design guide files andor. Database support for the mechanisticempirical pavement. The mepdg was subsequently supported by aashtos darwinme and most recently marketed as aashtoware pavement me design. Software tools and solutions to design concrete pavements. A manual of practice mepdg and the aashtoware pavement me design software. The software can be downloaded for installation on a local drive in executable. A mechanisticempirical pavement design guide mepdg has been developed in the usa under the nchrp 7a in 2004 to address shortcomings in the current pavement design methods. Merra climate data for mepdg inputs enables users to download merra climate data in a format that is being used as an input for the aashtoware pavement me design software. Perpetual pavement asphalt pavement designed to last over 50 years without major structural rehabilitation needing only periodic surface renewal. Pavement me users may use 90% reliability if the trial design at 95% proves burdensome. The mechanisticempirical pavement design guide, related documentation, and the latest version of its software are available online for evaluation through 30.
It accounts for traffic, climate and pavement structure interaction and allows. The accompanying software, aashtoware pavement me design, was released in 2011. Identify the required resource to design pavements using mepdg procedure staff, software, and subgrade investigation practice. By using newer data collected as part of the longterm pavement performance ltpp program, the mepdg allows for design inferences that. This document is available to the public through the national technical information service. In 2010, adot contracted with applied research associates, inc. However, hma overlays are susceptible to fatigue cracking alligator and longitudinal. Background and problem statement the mechanisticempirical pavement design guide mepdg was developed under national cooperative highway research program nchrp project 7a as a novel mechanisticempirical procedure for the analysis and design of pavements. Mechanisticempirical design national asphalt pavement.
Me software will be required to extend these results to routine pavement design evaluations. Additional calibration efforts using the recently released darwin. It is based on past mndot experience, the experience of other groups and agencies. Since the output of the mepdg design is the pavement response, it helps analyze the present pavement condition to help find the best rehabilitation methods. Implementation of the aashto mechanisticempirical pavement design guide and software documents the experience of transportation agencies in the implementation of the 2008 american association of state highway and transportation officials aashto mechanisticempirical pavement design. This manual provides background information pertaining to pavement design. Pcc materials input values for mechanisticempirical. Mechanisticempirical pavement design guide transportation. This guide incorporates latest pavement knowledge and. This manual provides guidance on utilizing aashtos software package pavement me design, version 2. Mepdg software can compute how the trial design will respond to the load and environmental stresses created by these inputs.
Aashtoware pavement me design is a productionready software tool to support the daytoday operations of public and private pavement engineers. It reflects a change in the methods and procedures engineers use to design pavement structures by taking advantage of the advances in material mechanics, axleload spectra and climate data for. Implementation of the mepdg for new and rehabilitated. Aashtoware pavement me design is a mechanisticempirical pavement thickness design software that was formerly known as the mechanisticempirical pavement design guide mepdg and darwin me. Hot mix asphalt hma overlays are preferred for both flexible and rigid pavements. It is strongly encouraged this memo is read prior to downloading or viewing mechanistic.
The report may serve as a basis for developing procedures for incorporating preservation in the american association of state highway and transportation officials aashto mechanisticempirical pavement design guide. The mepdg software includes the pavement condition prediction over time. The mechanisticempirical pavement design guide, related documentation, and the latest version of its software are available online for evaluation through 30 september 2011. The online version of the mechanisticempirical pavement design guide is available to anyone with internet access who has an interest in evaluating the guide and software. Aashtoware pavement me design is the next generation of pavement design software, which builds upon the national cooperative highway research. The mepdg is designed to update the 1993 aashto guide for design of pavement structures, which is primarily based on empirical observations from the aasho road test that began in the 1950s. In 2008, the american association of state highway and transportation officials published the mechanisticempirical pavement design guide. However, it is substantially more complex than the 1993 aashto design guide and it requires. This training is intended for consultants, contractors, designbuilders, and geotechnical firms who are involved in pavement designanalysis and conducting geotechnical investigation for pavement.
To accomplish this objective, all of available pmis data for interstate and primary roads in iowa were retrieved from the iowa dot pmis. The mepdg and accompanying software are based on mechanisticempirical me principles and are a significant departure from the previous empirically based. The software can be downloaded for installation on a local drive in executable form, but its copyprotection feature requires access to the internet to check for a specific file on the transportation research board web. Mechanisticempirical pavement design guide mepdg methodology and software as part of national cooperative highway research program nchrp. This feature allows users to download the hourly climatic database. Aashtoware pavement me design is the next generation of aashtoware pavement design software, which builds upon the mechanisticempirical. Th is manual of practice presents information to guide pavement design engineers in making decisions and using aashtoware pavement me design for new pavement and rehabilitation design. Mechanisticempirical pavement design guide mepdg for new pavement sections. It also includes guidance for performing pavement surveys, preparation of design recommendations, and submittal of the materials design recommendations mdr report formerly called the soils letter. The bottomup cracking, total deformation and iri were used at 95% reliability in the webbased development of the kentucky pavement design program. The design process is based on the predictive performance of a pavement section to be designed to predefined parameters identified as failing. Th e manual does not provide guidance on developing regional or local calibration factors for predicting pavement distress and smoothness.
This is a proprietary aashtoware computer software product. Memorandum from aashto containing project scope and information. Status of pavement design in the us 2003 webcasts of design guide workshops. Existing pavement input information for the mechanistic. Current practice is 1993 aashto pavement design guide developed between late 50s and late 90s based on aasho road test vdot adopts 1993 process in early 2000 aashto declared sun set on 1993 design software e. The mechanisticempirical pavement design guide mepdg was developed under national cooperative highway research program nchrp project 7a as a novel mechanisticempirical procedure for the analysis and design of pavements. Local calibration of the mechanisticempirical pavement. This leads to an estimate of the level of damage the pavement will sustain over time, in terms of pavement distresses and deterioration in ride quality. Many agencies are implementing or considering implementing mechanisticempirical pavement design guide mepdg tools, primarily aashtoware pavement me design, to develop and validate their designs. The goal of the mechanisticempirical pavement design guide mepdg is to identify the physical causes of stresses in pavement structures and calibrate them. Aashtoware pavement me design is a powerful program that incorporates a userfriendly interface with several functional, stability, and performance enhancements. It should also be noted that in 2008, aashto released the mechanisticempirical pavement design guide. The mechanisticbased nature of the methodology and the modular design of the software will allow for ongoing enhancement of the mepdg as new material characterization, traffic, climate, and analysis models are developed. The mepdg represents a significant advancement and paradigm shift in pavement design.
Aashto mechanisticempirical pavement design guide in arizona. A manual of practice mepdg and released the first version of the accompanying software program, aashtoware pavement me designtm. The majority of pavement work conducted by odot involves rehabilitation of existing pavements. Can anyone help me to get the mepdg software for pavement. This guide was to address all new including lane reconstruction and rehabilitation design issues, and provide an equitable design basis for all pavement types. Dgit workshops and training mechanistic empirical design. The pavement design guide is provided in an adobe pdf format that is readonly, nonsave, nonprintable, and noneditable. Hcd file based upon merra data for the selected section.
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