Abstract
This paper quantifies environmental load of road works and total material flow of roads in Japan. We develop a mathematical model that calculates material flow of roads in Japan based on the ratio of two types of road repairing works: replacing and resurfacing. Total material flow is strongly influenced by the introduction scale of resurfacing that has the lower environmental impact. From the material balance of construction wastes, it is clarified that the road is just a temporal stock of construction wastes and the increase of resurfacing is effective to reduce the net construction waste from roads.
