 transportation in south korea is provided by extensive networks of railways, highways, bus routes, ferry services and air routes that criss-cross the country. ==history== development of modern infrastructure began with the first five-year development plan (1962â66), which included the construction of 275 kilometers of railways and several small highway projects. construction of the gyeongbu expressway, which connects the two major cities of seoul and busan, was completed on 7 july 1970. 1970s saw increased commitment to infrastructure investments. the third five-year development plan (1972â76) added the development of airports, seaports. subway system was built in seoul, highway network was expanded by 487&nbsp;km and major port projects were started in pohang, ulsan, masan, incheon and busan. railroad network experience improvements in the 1980s with electrification and additional track projects. operation speed was also increased on the main lines. though the railroad was still more useful for transportation of freight, passenger traffic was also growing. there was 51,000 kilometers of roadways by 1988. expressway network was expanded to connect more major cities and reached a combined length of 1,539 kilometers before the end of the decade. ==railroad==  thumb|ktx train the largest railway operator is korail. railway network is managed by korea rail network authority. korea train express began service in april 2004, at korea's first high-speed service. intercity services are provided by saemaeul-ho and mugunghwa-ho. saemaeul-ho generally stops less than mugunghwa-ho and provides more comfortable seats and service. tonggeun (commuter train, not to be confused with subways) serves some selected lines. they stop in all stations and seat reservation is not available. new nuriro-ho service was recently added between seoul and sinchang station. nuriro-ho serves commuters around seoul metropolitan area, providing shorter travel time than seoul subway. the rapid trains have same cost and seat reservation as mugunghwa-ho. korail plans to expand the service area.ë¬´ê¶íí¸ ì´ì°¨ ì ì°¨ ì¬ë¼ì§ë¤, ytn, 2009ë 6ì 6ì¼ there's also a plan to introduce itx-saemaul, which is supposed to replace saemaul-ho. ===subways===  south korea's six largest cities â seoul, busan, daegu, gwangju, daejeon and incheon â all have subway systems. [[seoul metropolitan subway|seoul's subwa
Transport_in_South_Korea