UAM stands for Urban Air Mobility, which refers to a futuristic air transport service that uses a vertical take-off and landing drone taxi in the city center. Currently, there are on-ground transportation services such as buses, subways, passenger cars, and trains. However, as urbanization accelerates, ground traffic in the city center is saturated. To solve this problem, many underground roads and overpasses have been built, but not only are they not enough, but the environmental pollution is also becoming a big issue as there are more vehicles with internal combustion engines. UAM is a three-dimensional urban air transportation that has emerged to solve such a problem of two-dimensional ground transportation. Flying cars have long been selected as a future mode of transportation, but now many airline companies are on the way to realize it. Several start-up companies around the world are developing vertical take-off and landing UAM aircraft, and several of them have completed development and are preparing for commercialization.
 
Two things are essential for UAM to be commercialized. The first is an eVTOL aircraft, and the second is an urban Vertiport. In this project, UAM Vertiport was planned. Vertiport requires many elements such as take-off and landing areas, airframe parking lots, and waiting spaces for passengers. In addition, a very large rooftop space with a distance of at least 150m between the takeoff and landing sites is required to meet the standards of the UAM takeoff and landing site (TLOF/FATO) and the approach/department surfaces prescribed by the Federal Aviation Administration (FAA). In line with these conditions, the East Seoul Terminal was rebuilt and the UAM Vertiport was built to design a complex transfer center that could comprehensively use UAM, buses, and subway (Gangbyeon Station).