downtown area (Jung-gu and Jongno-gu districts) as well as surrounding neighbourhoods, including Cheongnyangni in the east, Mapo-gu in the west, and Noryangjin across the Han River to the south. The networks reached its peak in 1941, but was abandoned in favor of cars and the development of a subway system in 1968. Seoul Subway Line 1 and Line 2 follow the old streetcar routes along Jongno and Euljiro, respectively. Buses Regional services Virtually all towns in South Korea of all sizes are served by regional bus service. Regional routes are classified as gosok bus (고속버스, "high speed" express bus) or sioe bus (시외버스, "suburban" intercity bus) with gosok buses operating over the longer distances and making the fewest (if any) stops en route. Shioe buses typically operate over shorter distances, are somewhat slower, and make more stops. It is possible to reach another city by intercity buses. From Seoul, the place is Express Bus Terminal, the subway station is served by Seoul Subway Lines 3, 7 and 9. Local services Within cities and towns, two types of city bus operate in general: jwaseok (좌석, "coach") and dosihyeong (도시형, "city type") or ipseok (입석, "standing"). Both types of bus often serve the same routes, make the same (or fewer) stops and operate on similar frequencies, but jwaseok buses are more expensive and offer comfortable seating, while doshihyeong buses are cheaper and have fewer and less comfortable seats. Many small cities and towns do not have jwaseok buses and their buses are officially called nongeochon (농어촌, "rural area" bus). The local buses in Seoul and other cities work by colours: the blue buses cross the entire city, the green ones mean that some of their stops are close to a subway station, and the red buses go out of the city. Some cities have their own bus classifying systems. Other services Incheon International Airport is served by an extensive network of high-speed buses from all parts of the country. Beginning in the late 1990s, many department stores operated their own small networks of free buses for shoppers, but government regulation, confirmed by a court decision on June 28, 2001, have banned department stores from operating buses. However, most churches, daycare centres and private schools send buses around to pick up their congregants, patients or pupils. Roads Highways in South Korea are classified as freeways (expressways/motorways), national roads and various classifications below the