抄録
A multi-stages planning for road-improvement should be proceeded with in a preferential order of effect of the improved road on the functional uses, such as a traffic equipment and a open communityspace, and on the inductive action for changes of a land-use pattern in that area. The models maximizing the total effect during the multi-stages planning period have been developed by using operations research methods. They, however, may be difficult to be applied to actual planning situations because the large number of calculation steps cause considerable complexities in the model. The sequential method proposed here is composed of two parts: The first selects out some operational alternatives with a quantitative evaluation of effect of link-unit on the road-functional uses. The second gets an optimal solution through evaluating a network-effect of the selected alternatives.
