Abstract
As many bridges in Japan were constructed in the period of high economic growth, demands on maintaining and operating aging bridges are growing. Although 2D drawing is the main method to maintain bridges today, 3D product models should be used for maintenance in order to increase the efficiency. Conventional product models are highly detailed, yet they are not indispensable for maintenance works. The purpose of this research is to determine optimum level of development (LOD) to represent existing bridges with 3D product models. In this paper, we have estimated cost for modeling and proposing LOD, and considered the method for estimating benefit of modeling.
