Abstract
The pavement repair policy is planned and implemented based on the knowledge of pavement engineering, and improved constantly by reflecting the experience and know-how that have been accumulated by field engineers for many years. Therefore, it is difficult to scientifically discuss the appropriateness of pavement repair policies. After the development of road surface measurement vehicles, etc., enormous data of road surface conditions of expressways has been accumulated. In this study, the authors estimate the deterioration curve and expected lifetime of road surface statistically by using enormous inspection data, and propose a methodology for evaluating pavement repair policies by comparing them with actual values. In addition, the authors discuss (1) the evaluation indices for managing the road surface for which drainage pavement is increasingly used, (2) road surface inspection interval, and (3) the appropriateness of repair cycle, by comparing estimated and actual lifetimes of road surface, targeting the roads managed by Kansai Branch of NEXCO West Japan.
