With the rapid socioeconomic trends change in ther recent years, Seoul citizens' perspectives on movement and social demands are also diversifying. In the Seoul metropolitan area, the elderly population and single-person households have rapidly increased, and consequently, the demand for untact services, and the social acceptance of related existing technologies and systems has increased after COVID-19. In addition, Seoul is in a dual situation where the importance of base facilities is emphasized by the supply of the third new city and the expansion of the wide-area transportation network leading to Seoul, and the need for distributed infrastructure to cope with changing traffic demand and recurrent infectious diseases.

In terms of technology, several 4th industrial revolution technologies are rapidly responding to the new social needs by combining them with the platform industry, and the mobility sector is also shifting the paradigm of transportation and services. The spread of personal mobility(PM), such as electric kickboards, shows the potential to improve movement in cities, while presenting questions about how new transportation should coexist with the existing means and infrastructure. Cars cantered on internal combustion engines are rapidly converting to electric power, and various means such as self-driving cars, unmanned delivery robots, and Urban Air Mobility (UAM) are also expected to be part of in our lives in the near future.

The legal system in the field of residual transportation is generally composed of a single functional infrastructure unit, and the construction and operation of the actual infrastructure are also cantered on a single function. However, while the number of transportation methods appearing in the urban transportation system increases and the functions required for urban transportation infrastructure, such as support facilities and interconnection facilities, are gradually increasing, it is difficult to run smoothly due to the limited number of sites available in the city department.

In order to efficiently respond to changes in the traffic trends and calls to the transportation system in the future, it is important to consider ways to utilize the existing infrastructure in a more flexibe manner. In this study, the limitations and improvement of the existing transfer function-oriented base facilities were derived based on future traffic behaviour and prospects for technological development. In addition, hierarchies were divided according to the characteristics of transportation functions and roles in the cities, and locations and available sites or facilities that can be considered for each function were derived and presented for reference in the actual stage of use.