The Sinansan Line (

Hangul The Korean alphabet is the modern writing system for the Korean language. In North Korea, the alphabet is known as (), and in South Korea, it is known as (). The letters for the five basic consonants reflect the shape of the speech organs ...

: 신안산선,

Hanja Hanja (; ), alternatively spelled Hancha, are Chinese characters used to write the Korean language. After characters were introduced to Korea to write Literary Chinese, they were adapted to write Korean as early as the Gojoseon period. () ...

: 新安山線, meaning "New Ansan Line") is the tentative name of a

commuter rail Commuter rail or suburban rail is a Passenger train, passenger rail service that primarily operates within a metropolitan area, connecting Commuting, commuters to a Central business district, central city from adjacent suburbs or commuter town ...

line that will eventually link Cheongnyangni station with western

Gyeonggi province Gyeonggi Province (, ) is the most populous province in South Korea. Seoul, the nation's largest city and capital, is in the heart of the area but has been separately administered as a provincial-level ''special city'' since 1946. Incheon, ...

, passing through key areas of the Seoul metropolitan area, including

Yeouido Yeouido (), also Yohido, is a river island on the Han River in Seoul, South Korea. It is Seoul's main finance, media, and investment banking district. It is large and has a population of 32,674 . The island is located in the Yeongdeungpo Dis ...

Yeongdeungpo Yeongdeungpo District () is one of the 25 districts of Seoul, South Korea. Although the origin of the name is uncertain, the first two syllables are thought to be from "''yeongdeung''" (靈登) or "divine ascent", a shamanic rite. The third sy ...

and

Gwangmyeong station Gwangmyeong station () is a train station in Gwangmyeong, South Korea. The station was newly built as a stop of national railway operator Korail's KTX high-speed service, south of Seoul Station. The area surrounding the station is home to t ...

, scheduled to open in December 2026.

Planning

The forerunner of the Sinansan Line was Line 10, proposed in 1994 as part of Seoul Metro's Phase 3 expansion but was mostly unbuilt due to the

1997 Asian financial crisis The 1997 Asian financial crisis gripped much of East Asia, East and Southeast Asia during the late 1990s. The crisis began in Thailand in July 1997 before spreading to several other countries with a ripple effect, raising fears of a worldwide eco ...

. Originally Line 10 was also planned to extend east beyond downtown Seoul going through either Sinchon, Dongnimmun and Hyehwa or pass through Gongdeok, Seoul Station and Dongdaemun Stadium. However, following the restoration of the

Cheonggye Stream Cheonggyecheon (, ) is a stream and public space in downtown Seoul, South Korea. A natural stream sourced from the Suseongdong Valley in Inwangsan, it was historically maintained as part of Seoul's early sewerage until the mid-20th century, when ...

, under which Line 10 was planned to be laid, the former route seems much more likely. The Sinansan Line underwent many design changes during planning stages, but generally the line was envisioned to run between Sinpung and

. In particular, the section south of Gwangmyeong station has led to heated disputes between the cities of

Ansan Ansan (, ) is a city in Gyeonggi Province, South Korea. It lies southwest of Seoul and is part of the Seoul Metropolitan Area. It is connected to Seoul by rail via Seoul Subway Line 4. It is situated on the Yellow Sea coast and some islands lie ...

and

Siheung Siheung (; ) is a Administrative divisions of South Korea, city in Gyeonggi Province, South Korea. The city has a population of 511,807 people, where 508,646 are residents out of 218,846 households as of August 2021. Siheung acquired its cu ...

. Ansan has requested for the line to be built almost perfectly south from Gwangmyeong station so it terminates at Hanyang Univ. ERICA Campus, passing through Seongpo-dong on the way. This would also open the possibilities for the trains on this line to travel to

Suwon Suwon (; ) is the largest city and capital of Gyeonggi Province, South Korea's most populous province. The city lies approximately south of the national capital, Seoul. With a population of 1.2 million, Suwon has more inhabitants than Ulsan, tho ...

via the

Suin Line The Suin Line (Suwon-Incheon; ) was a metro line of the Seoul Metropolitan Subway serving the Seoul Capital Area. The original route, abandoned in 1995, was one of the few narrow-gauge railways in South Korea. Opened by the privately owned Cho ...

. The consortium behind the construction of the Sin Ansan Line, however, favors a line running southwest from Gwangmyeong station and joining the Sosa-Wonsi Line, transferring with Line 4 and the

Choji station Choji station () is a railway station, commuter railway station on Seoul Subway Line 4, the Suin–Bundang Line and the Seohae Line in Ansan, South Korea. Trains on Line 4 utilize what is officially named the Ansan Line within the city of Ansan, ...

and terminating at southwestern Ansan. The city of Siheung proposed the section in dispute does not even pass through the city of Ansan at all, making the name "Sin''ansan'' Line" meaningless. The Siheung plan has the section go west from Gwangmyeong station, intersect the Sosa-Wonsi Line at Siheung City Hall, and terminating at

Wolgot station Wolgot station () is a railroad station on the Suin–Bundang Line in Siheung, Gyeonggi Province, South Korea. It opened on 30 June 2012. There are many Seafood restaurants located near the station. When the Gyeonggang Line The Gyeonggang Li ...

. Construction was planned to begin in 2015 with the first section of this line (Gwangmyeong station - Yeouido) is set to be opened in 2023. However, contract disputes between the Ministry of Land, Transport and Maritime Affairs and the preferred operator delayed the project and lead to a retendering. Construction of Phase 1 (Yeouido to Hanyang University/Songsan stations) began 2019 September 9.

History

* 2007 June 7: Feasibility Study Announcement * 2007 June 5: The Primary Route Announced * 2008 March 20: Second Route Announced * 2009 November 3: Confirmed Gwangmyeong Southern Section Final Route * 2010 December 15: Master Plan Presented

Accidents

On April 11, 2025, a construction site of the line in

Gwangmyeong Gwangmyeong (; ) is a Administrative divisions of South Korea, city in Gyeonggi Province, South Korea. It borders Seoul to the east, north and northeast, Anyang, Gyeonggi, Anyang to the southeast, Siheung to the southwest, and Bucheon to the nort ...

collapsed, trapping two construction workers inside. Authorities have ordered evacuations for nearby residents. One was rescued on the next day while another was found dead after five days of searching.

Stations

NOTE: The Ministry of Land, Transport and Maritime Affairs announced the station list on December 15, 2010, routes are finally announced on 2015.

Siheung Branch Line (planned)

References

External links

Nextrain Co., Ltd. official website
{{Public transport in the Seoul Metropolitan Area Proposed public transport in South Korea Seoul Metropolitan Subway lines