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
Chaebol culture. Massive market concentration exists as is evident from the fact that 80% of the country's GDP is derived from the chaebol. The largest of the group, Samsung, exports 20% of South Korea's goods and services alone. Although no longer financially supported by the government, these firms have attained economies of scale on such a massive level that it is extremely difficult for a startup or small or medium enterprise (SME) to surmount the high barriers to entry. A majority of these smaller companies end up being acquired by the chaebol, only increasing their size and economic dominance. In recent