Most foreigners will agree that Korea has an excellent public transportation system. In Korea, you can reach almost everywhere by bus or subway. It is considered superb in terms of its easy access and cleanness.
Korea’s transportation system is now recognized as one of the finest example among other countries. In the past, many Koreans complained of ineffective subway and complicated road systems. But after it adopted the transit discount system and better equipped subway systems, situation got much better than ever.
Comfortable Public Transportation System
Korea’s transportation system can be considered a role model for other countries (Source: Yonhap News Agency)
There has been so much improvement in traffic system that now Korea’s traffic system is widely regarded all over the world. Most importantly, the subway and bus companies do not compete with each other for passengers and it became a win-win situation for them.
It can be considered cleaner here than in any other subways around the world (Source: Yonhap News Agency)
For example, the transit discount system helps passengers save their money, which is found only in Korea. For this reason, many policy makers from many countries visited Korea to learn more about Korea’s traffic system. It is common for Korean to pay with digital card when taking a bus, but in many countries, people are still paying by cash.
Moreover, a variety of bus and subway line can be considered remarkable. Since all buses were divided into four colors- blue, green, red and yellow- according to the routes, it became much convenient to take buses even in the rush hour.
Edited until here but do read more at this link