Seoul is one of the largest metropolises in the world with population of over ten million people.
It is also one of the most densely populated cities in the world, with area of 605 square kilometers. Due to the dense population, traffic congestion is a serious problem in Seoul. Note, however, that a systematic, advanced public transportation system provides convenience and helps alleviate such congestion. Various bus routes are available across the city. At first, the bus routes can seem daunting; with some experience and understanding of the system, however, you will find that they are a very convenient means of transportation.
Bus routes cover all corners of the city, but the most efficient method of getting around town is by Seoul Metro. Not only is it cheap; the average travel time between stations is around 2 to 3 minutes. This is unimaginable for commuters traveling by taxi or bus or motorists during the hectic rush hours.
Trains to regional cities have become a lot more convenient with the expansion of KTX since 2010. In addition to KTX, two major domestic airlines as well as several other smaller airlines offer flights to numerous regional cities on a daily basis.