韩国首尔地铁发展概况

首尔的交通运输 首尔自600多年前开始，一直是了韩国极具重要性、国际化的首都。首尔跨地域SMA以达11776平方公里，包括23座城市、23．232亿人口。首尔城人口占SMA总人口的442％（1028万），这是韩国总人口的21％。同时，首尔拥有1230000亿的经济能力，占国家GDP的22％。是SMA人口密度最大的城市，也是世界上人口最多的城市之一，每平方公里1973人。首尔位于SMA的中央位置，其人I：1密度为每平方公里16959。

The Development of Seoul Metro

Subway is more advantageous mode of transportation than others in regard of transport efficiency, environmental friendliness, stability, and land use efficiency, so that it may be considered as the most desirable means of transportation in 21st century and an optimal alternative to settle the transportation problems of Seoul and SMA. Since the launch of subway Line 1 in 1974, total length of 287 km and 8 lines of subway has been constructed and in operation. Line 9 is under construction, and the extension plan of the existing subway lines such as Line 3 and 7 are actively in progress.