The Ministry of Land, Infrastructure and Transport aims at the "compact city + network" that realizes a virtuous circle through collaboration between a site location plan and regional public traffic restructuring plan. Meanwhile, in local cities, public transportation facilities are not satisfied as in the metropolitan area, the degree of dependence on cars is extremely high at present. In the future, rapid development of automatic driving technology is expected, there is a high possibility that this trend will not change significantly even if the aging society progresses. In this study, commuting distance by automobiles with high dependency in local cities was chosen as an evaluation indicator. Utility as an evaluation indicator was clarified through verification of CO2 emission reduction effects resulting from shortening commuting distance due to centralized urban areas. Also, the low carbonization evaluation method has been devised that can extract districts contributing to low carbonization.