Asphalt Rubber Technology Information Center
Implementation of the 1986 AASHTO Guide at the City and County Levels
Mamlouk, Michael S., Ph.D., P.E., ASU; Cano, Joe O., P.E. and Charania, Equbal, Ph.D., P.E., City of Phoenix
Arizona (City of Phoenix)
January, 1989
Cost, Performance, Recyclability
Key Words:

Many cities and counties have not yet implemented the 1986 AASHTO guide mostly because of its sophistication and its
wide scope.  This paper provides guidelines and recommendations to narrow the scope of the guide to match the local
conditions.  The paper summarizes the main steps recommended by the guide for the design and rehabilitation of
flexible pavements.  The paper discusses some of the obstacles that might face the design engineers at the city and
county levels due to budget and equipment limitations.  Training is needed by local designers to adopt the mechanistic
concepts of the guide such as the use of nondestructive testing data, the use of resilient modulus values, the choice of
reliability levels, and the use of life cycle cost analysis.  Engineering judgement and previous experience are still
needed for the proper implementation of the guide especially during the transition between the old and the new guides.
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