2006 年 22 巻 p. 5-8
Tokyo Metropolitan Government manages about 2, 229km road and 1, 238 bridges and 92 tunnels in capital Tokyo. The road assets which Tokyo Metropolitan Government manages have two peak of construction. I think that we must update many of road structure for deterioration ten several years later. However, I think about updating all with impossibility in current financial conditions because extraordinary cost is necessary in replacement of structure. Therefore, The Tokyo Metropolitan Government decided to introduce road asset management early to solve this problem.