Sinansan Line

The Sinansan Line (Hangul: 신안산선, Hanja: 新安山線, meaning "New Ansan Line") is the tentative name of a commuter rail line that will eventually link Cheongnyangni station with western Gyeonggi province, passing through key areas of the Seoul metropolitan area, including Yeouido, Yeongdeungpo and Gwangmyeong station, scheduled to open in December 2026.

Sinansan Line
Overview
Native name	신안산선(新安山線) Sinansan-seon
Status	Under Construction
Termini	Yeouido Jungang (Songsan)
Stations	13 (17)
Service
Type	Rapid transit
System	Seoul Metropolitan Subway
History
Planned opening	December 2026
Technical
Line length	46.9 km (29.1 mi)
Number of tracks	2

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.^[1] 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, 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 Gwangmyeong station. In particular, the section south of Gwangmyeong station has led to heated disputes between the cities of Ansan and Siheung. 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 via the Suin Line. 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 Suin Line at Choji station 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 "Sinansan 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.

Construction was planned to begin in 2015 with the first section of this line (Gwangmyeong station - Yeouido) is set to be opened in 2023.^[2] However, contract disputes between the Ministry of Land, Transport and Maritime Affairs and the preferred operator delayed the project and lead to a retendering.^[3][4]

Construction of Phase 1 (Yeouido to Hanyang University/Songsan stations) began 2019 September 9.^[5]

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^{[citation needed]}

Accidents

On April 11, 2025, a construction site of the line in Gwangmyeong collapsed, trapping two construction workers inside. Authorities have ordered evacuations for nearby residents.^[6] One was rescued on the next day while another was found dead after five days of searching.^[7]

Stations

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

Sinansan Line
Legend
Seoul Station Gongdeok ↑ Phase 2 (Proposed) Yeouido Yeongdeungpo Dorimsageori Sinpung Daerimsageori Guro Digital Complex Sindoksan Siheungsageori Seoksu Gyeonggang Line to Yeoju Gwangmyeong ↙ Sinansan Line Branch Shared with Gyeonggang Line Mokgam Jangha (TBD) Seongpo Jungang Hosu Hanyang Univ. ERICA Campus Hagon (TBD) Maehwa (TBD) Seohae Line to Ilsan Siheung City Hall ← Gyeonggang Line to Yeonsu ↓ Shared with Seohae Line Siheung Neunggok Dalmi Seonbu Choji link to Ansan Line Siu Wonsi Int'l Theme Park Songsan Depot Songsan Seohae Line to Hongseong
Express services Yeouido Yeongdeungpo Dorimsageori Sinpung Daerimsageori Guro Digital Complex Sindoksan, Siheungsageori Seoksu Gwangmyeong Mokgam, Seongpo Jungang Hosu Hanyang Univ. ERICA Campus

Station Number	Station Name English	Station Name Hangul	Station Name Hanja	EX[8]	Transfer	Station Type	Location
	Seoul Station (planned)	서울	-驛			Underground	Seoul	Jung-gu
	Gongdeok (planned)	공덕	孔德			Underground		Mapo-gu
	Yeouido (under construction)	여의도	汝矣島	●		Underground		Yeongdeungpo-gu
	Yeongdeungpo (under construction)	영등포	永登浦	●		Underground
	Dorimsageori (under construction)	도림사거리	道林사거리	|		Underground
	Sinpung (under construction)	신풍	新豊	●		Underground
	Daerimsamgeori (under construction)	대림삼거리	大林삼거리	|		Underground		Guro-gu
	Guro Digital Complex (under construction)	구로디지털단지	九老디지털團地	●		Underground
	Sindoksan (under construction)	신독산	新禿山	|		Underground		Geumcheon-gu
	Siheungsageori (under construction)	시흥사거리	始興사거리	|		Underground
	Seoksu (under construction)	석수	石水	●		Underground
	Gwangmyeong (under construction)	광명	光明	●	KTX Gyeongbu, Honam & Gwangmyeong Shuttle (2026)	Underground	Gyeonggi-do	Gwangmyeong-si
	Mokgam (under construction)	목감	牧甘	|		Underground		Siheung-si
	Seongpo (under construction)	성포	聲浦	|		Underground		Ansan-si
	Jungang (under construction)	중앙	中央	●	Suin-Bundang Line	Underground
	Hosu (under construction)	호수	湖水	|		Underground
	Hanyang University ERICA Campus (under construction)	한양대에리카캠퍼스	漢陽大에리카캠퍼스	●		Underground

Siheung Branch Line (planned)

Station Number	Station Name English	Station Name Hangul	Station Name Hanja	Transfer	Station Type	Location
	Gwangmyeong (planned)	광명	光明	KTX Gyeongbu, Honam & via Gwangmyeong Shuttle (2026)	Underground	Gyeonggi-do	Gwangmyeong-si
	Maehwa	매화	梅花	(2026)	Underground		Siheung-si
	Siheung City Hall (planned)	시흥시청	始興市廳	Seohae Line (2026)	Underground
	Seonbu (planned)	선부	仙府	Seohae Line	Underground		Ansan-si
	Choji (planned)	초지	草芝	& Suin Line	Underground
	Siu (planned)	시우	時雨	Seohae Line	Underground
	Wonsi (planned)	원시	元時	Seohae Line	Underground
	USKR (planned)	USKR	USKR		Aboveground		Hwaseong-si
	Songsan (planned)	송산	松山		Aboveground