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Seoul Subway Line 5 of the Seoul Metropolitan Rapid Transit Corporation, dubbed ''the purple line'', is a long line crossing from the west to the east across the Seoul National Capital Area, South Korea. Line 5 holds the distinction of being one of the two subway lines in Seoul to cross ''under'' the Han River (the other being Bundang Line), which is done at two points (between Mapo–Yeouinaru and Gwangnaru–Cheonho). The line also branches into two different lines at Gangdong Station to terminate at Sangil-dong Station and Macheon Station. The total length of this line is 52.3 km. Once the longest underground tunnel constructed, today it is the 3rd longest fully underground subway line in the world just behind Guangzhou Metro Line 3 and Beijing Subway Line 10 (see world's longest rapid transit tunnel). == History == The line was built 1990~1996 and is an important east-west link connecting Gimpo Airport, the Yeouido business area, downtown Seoul, and the Gangdong residential districts. In 1996 Line 5 was implemented with Automatic train operation. However, it was deemed that a driver would be necessary in case of a breakdown of the automation system, therefore each subway train has one driver on board. It was the world's longest underground railway line for 9 years until Guangzhou Metro Line 3 came into operation in 2005. In December 2010 the line is recorded as having the third highest WiFi data consumption in the Seoul Metropolitan area. It averaged 1.67 times more than the other 14 subway lines fitted with WiFi service zones. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Seoul Subway Line 5」の詳細全文を読む スポンサード リンク
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