交通成本　　在铁路、公路、航空、水运和管道五种交通方式中,水运的运输成本最低。据统计,海洋运输占整个国际运输的75%～80%。海运运输成本比铁路运输低 45%,比公路运输低 95%。欧盟外贸总额的大约90%通过海运实现。韩国对外贸易99.7%的进出口货物通过海运实现。 交通拥堵　 Transportation costs Among the five transportation modes of railways, highways, airlines, waterways and pipelines, the transportation cost of water transport is the lowest. According to statistics, marine transport accounts for 75% ~ 80% of the total international traffic. Seaborne transport costs 45% less than rail transport and 95% less than road transport. About 90% of EU’s total foreign trade is realized by sea. 99.7% of Korea’s foreign trade imports and exports are realized by sea. traffic congestion