For airport pavements in Japan, the need for rehabilitation work is classified into three categories: unnecessary, necessary in near future and necessary immediately, based on the Pavement Rehabilitation Index (PRI), which quantifies the pavement surface conditions in terms of cracking, rutting and roughness. If rehabilitation is judged to be necessary, the appropriate work will be planned and carried out. To optimize the budget allocation for rehabilitation work, the Airport Pavement Optimal Rehabilitation Timing System (AirPORTS) was developed for application to asphalt pavements. AirPORTS is composed of four subsystems: a database subsystem; an optimal rehabilitation method selection subsystem; a yearly rehabilitation expense prediction subsystem; and a budget equalization subsystem. As example applications of AirPORTS, the optimal rehabilitation strategies of two airports are described. Extensive data on the construction and rehabilitation of asphalt pavements at both airports for a period of at least 20 years has been collected. Through a sensitivity analysis on several variables, the optimal rehabilitation strategy was determined.
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