APPLICATION OF FUZZY LOGIC TO LIFE-CYCLE COST ANALYSIS OF HIGHWAY PAVEMENTS

The determination of the optimal highway pavement alternative is the result of a systematic decision-making process. Life-cycle cost analysis is a suitable tool to ensure decision-making. It is commonly used by global transportation authorities in selecting a best-fit highway pavement alternative. However, the high data requirement of the analysis is a significant disadvantage. This triggers the subjectivity in decision-making. Therefore, a new method is needed to overcome this problem. In this study, fuzzy logic technique was used because of its popularity in successful solutions. Vertex and DSW methods, which are fuzzy logic extension principles, were applied in life-cycle cost analysis of highway pavements. The application steps of the methods are given in detail in the study. As a result, the applicability of fuzzy logic in life-cycle cost analysis of highway pavements has been revealed