Transport in South Korea roads and various classifications below the national level. Almost all freeways are toll highways and most of the expressways are built, maintained and operated by Korea Expressway Corporation (KEC). The freeway network serves most parts of South Korea. Tolls are collected using an electronic toll collection system. KEC also operates service amenities (dining and service facilities) en route. There are also several privately financed toll roads. Nonsan-Cheonan Expressway, Daegu-Busan Expressway, Incheon International Airport Expressway, Seoul-Chuncheon Expressway and parts of the Seoul Ring Expressway are wholly privately funded and operated BOT concessions. Donghae Expressway was built in cooperation between KEC and
South Korea by the United States military in South Korea in response to North Korean missile tests has been protested strongly by the Chinese government, concerned that the technologically advanced missile defence could be used more broadly against China. Relations between the governments have cooled in response, with South Korean commercial and cultural interests in China having been targeted, and Chinese tourism to South Korea having been curtailed. The situation was largely resolved by South Korea making significant military concessions to China in exchange for THAAD, including not deploying any more anti-ballistic missile systems in South Korea and not participating in an