(前言) 路面因汽车荷载及气候的影响而变坏,产生裂缝、面层脱落和车辙等病害,随着这些病害的进一步发展,行车的安全性降低,需要经常的维修。因而,近年来的维修费用急剧增加。在有限的预算之内,决定从何着手修缮,已成为道路管理工作者非常重要的课题。 (Preface) Pavement is deteriorated due to the influence of car load and climate, resulting in cracks, surface shedding and rutting. With the further development of these diseases, driving safety is reduced and regular maintenance is required. As a result, maintenance costs have risen sharply in recent years. Within a limited budget, deciding where to start repairing has become a very important issue for road management workers.