In cities where population growth is not expected, it is becoming increasingly important to study future operations for Urbanization Control Areas (UCA) development activities and building activity controls. UCA has a wide variety of land uses, including those for maintaining natural environments such as agricultural land, green spaces, and forests, as well as vein industrial land, scattered residential land, medical care, welfare, and educational facilities. Therefore, comprehensive study is necessary. There are many existing settlements before the setting of Area Classification, and it is important to secure sustainability as a "left-over" residential area.
The purpose of this study is to consider the control of existing residential areas in UCA, taking as an example the efforts of Sapporo City, which is promoting residential construction in the Development Area of Position Designated Roads (DAPDR) of UCA by utilizing the District Plan.
As a result, the following points became clear.
In UCA, new housing constructions are not allowed in principle. Under such circumstances, it was clarified that the examination process leading to the implementation of the DAPDR rescue measures that ensured rationality and fairness through the precise operation of the City Planning Act while maintaining the consistency with the higher level plan.
After the District Plan was stipulated, the number of houses and residents increased in almost all DAPDRs.
Many cities have created Location Optimization Plans to maintain the population density of the Dwelling Attraction Area. Therefore, how to maintain the living environment in a small, low-density residential area on the outskirts of the city is an important issue. The points clarified in this study show that it is possible to maintain a living environment even at a low density by planning and implementing a detailed population allocation plan. This is a valuable finding.
In the future, it is necessary to understand the reasons for new residents to choose their place of residence and the evaluation of the living environment at a level different from that in the Urbanization Promotion Area. In addition, it is necessary to consider more effective population induction measures and applicability in other districts and cities based on the tendency of preference for residence.
