Fitts, P.E., a senior regional engineer with the Asphalt Institute. “One could say that the flexible pavement portion of MEPDG is descended from the Asphalt Institute’s ME design methods that have been around for more than 25 years,” says Gary L.

It is currently under review and will be balloted by the Subcommittee on Materials, the Subcommittee on Design, and the Standing Committee on Highways within the next year, says Newcomb. And AASHTO, the state highway transportation officials group, has convened a task force to develop Version 2.0, a faster, more user-friendly version of the software.ĪASHTO has not yet approved the new design guide. The development effort concluded earlier this year with the release of MEPDG version 1.0. Work started under the auspices of the AASHTO Joint Task Force on Pavements in 1996 with the largest National Cooperative Highway Research Program project funded in the 40-year history of NCHRP, says David Newcomb, P.E., PhD, vice president of research and technology, National Asphalt Pavement Association. At that meeting, a vision was created to develop a national mechanistic-empirical pavement design procedure.

The national effort began in the early 1990s, when an invitational workshop on mechanistic pavement design was held in Irvine, California. pavement design, a group of 19 Lead States has begun implementing the Mechanistic-Empirical Pavement Design Guide (MEPDG). In one of the largest movements in the history of U.S.

Aashto pavement design software