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 streams from overseas. All but 3 of the top 50 firms listed on the Korean Stock Exchange are designated as chaebol. Consequently, the chaebol have more bargaining power and oftentimes takes pricing action that squeezes both suppliers and consumers. Typically the firms down the supply chain fail to increase their profit margins enough to expand and thus never see growth. Collusion among the chaebol is commonplace. Price-fixing acts mean consumers expect to pay an inflated value for most goods and services. For instance, in 2012 Samsung and LG Electronics were fined for colluding to raise prices for home appliances. Since