Korea Expressway Corporation, KEC is the authority for national expressway system of Korea. As a government-affiliated organization under the Ministry of Land, Infrastructure, and Transport, KEC is responsible for planning, construction, operation, and maintenance of expressways in Korea. It constructs expressways, tunnels, and bridges, provides expressway maintenance services. The company also leases service areas and gas stations, offers research services, and provides services to the government, including supervision of government construction projects along various locations adjacent to the expressways.