Seoul Subway Line 1
| Line 1 | |||
|---|---|---|---|
  
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| Overview | |||
| Native name | 1호선（一號線） Il Hoseon |
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| Type | Rapid transit/Commuter rail | ||
| System | Seoul Metropolitan Subway | ||
| Status | Operational | ||
| Termini |
Soyosan Incheon / Sinchang / Gwangmyeong / Seodongtan |
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| Stations | 97 Seoul Metro: 10 Korail: 87 |
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| Operation | |||
| Opened | August 15, 1974 | ||
| Operator(s) | Seoul Metro & Korail | ||
| Technical | |||
| Line length | 200.6 km (124.6 mi) Seoul Metro: 7.8 km (4.8 mi) Korail: 192.8 km (119.8 mi) |
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| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) | ||
| Operating speed | 100 km/h (62 mph) | ||
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Seoul (Metropolitan) Subway Line 1 of the Seoul Metropolitan Subway, is a commuter rail service which links central Seoul, South Korea to Soyosan Station in the northeast, Incheon in the southwest, and Sinchang via Suwon and Cheonan in the south. The central underground portion of this rail line is the oldest subway section in the Seoul Metropolitan Subway system; the entire rail line covers a large part of the Seoul Capital Area. The underground section between Seoul Station and Cheongnyangni Station, which is referred to as Seoul Metro Line 1 (7.8 kilometers (4.8 mi)), is currently operated by Seoul Metro. The line first opened in 1974 with through services to overground national railroad tracks from Seongbuk Station (now: Kwangwoon University Station) to Incheon and Suwon Stations. At the time, the underground portion of Line 1 run by Seoul Metro was labeled red on maps. On the other hand, the remaining sections of the rail line run by Korail were labeled either blue or gray on maps, and the express lines were red. In 2000, the adjacent through-running Korail lines were officially bundled together as part of a greater Line 1, and the labeling on maps was changed to the current dark blue color. Commuter railway service was extended to Sinchang in December 2008.
Frequent service is provided between Soyosan, Dongducheon, Uijeongbu, Cheongnyangni, Seoul, Yongsan, and Guro, where trains split between Incheon in the west and Byeongjeom and Cheonan in the south. Express trains operate from Yongsan and Seoul Stations to Dongincheon and Cheonan stations.
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