Abstract
We consider that the individual rebuildings along by the narrow streets do not lead the improved environmental condition in the block. It is necessary to examine the availability of the cooperative improvement system. The aim of this research is to observe the feasibility for the cooperative improvement system to investigate the application of several building regulation systems. The results are as follows: (1) Each building regulation system has varied applied range for the road contact failure areas. (2) There are 4 factors : (physical condition, social contact, support system, human or economic condition) to build the consensus for cooperative rebuildings. (3) As a result of the simulation that apply the cooperative improvement system to building lots in Komagabayashi district, it becomes clear that the cooperative improvement system is available in case of the road contact failure areas.
