A transportation system in which the lowest expenses, which will be available in the cities and suburbs where the bus in Seoul it is divided into four colors, each color space covers.
A transportation system that charges were possible. Which will be available in the city and surrounding suburbs. The bus is in Seoul It is divided into four areas, each color on color covers.
Transportation cost is the lowest The services will be provided in the city and the suburbs. Which bus in Seoul, is divided into 4 colors according to area of each color covers.