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PARES--AN EXPERT SYSTEM FOR PRELIMINARY FLEXIBLE PAVEMENT REHABILITATION DESIGN

The development of a knowledged-based expert system to assist the New Mexico State Highway and Transportation Department in the evaluation and design of rehabilitation schemes for flexible pavements is described. The system uses information provided by users to establish preliminary rehabilitation schemes that would be reasonable and cost-effective. A cost-estimate module for ranking the rehabilitation schemes according to relative cost is integrated into the system. The need for such a system in New Mexico and the knowledge base used to construct the IF-THEN-ELSE type rules in the expert system are described, and the distress conditions addressed and the rehabilitation strategies considered are discussed. The system is rich in the sense that it also distinguishes among distress situations requiring routine maintenance as opposed to rehabilitation requiring more extensive construction efforts. An example session using the expert system is provided.