Great Train eXpress (GTX) is a higher-speed commuter rail network in the Seoul Metropolitan Area project consisting of three separate lines, named GTX-A, GTX-B and GTX-C, and scheduled for completion in 2030. Three other lines, named GTX-D, GTX-E and GTX-F are being planned.

GTX-A

The GTX-A, officially Metropolitan Area Rapid Transit Line A, is a higher-speed commuter railway line operating in two sections in Seoul, South Korea. Groundbreaking for GTX Line A was held on December 27, 2018, with service initially expected to commence in 2023. However, the project has been officially delayed due to land compensation issues and the discovery of archaeological ruins dating from the Joseon period.

The line currently runs in two separate sections - Dongtan to Suseo and Unjeongjungang to Seoul Station. Suseo, Seongnam, and Dongtan stations were opened on March 30, 2024, with Guseong Station opening later on June 29, 2024. The section between Unjeongjungang and Seoul Station opened on December 28, 2024.

Operation Approximately of the line are expected to share the same rail as the SRT, and an additional towards the western end of the route are expected to be completely underground. Trains operate at around three to four services per hour in each direction in the southern section with anywhere between 15 and 30 minutes between services. Meanwhile, the northern section operates at six services per hour per direction with ten minutes between services.

Each GTX-A train has a capacity of 1,090 passengers.

Future plans The connection between Seoul Station and Suseo is anticipated to open in August 2026. However, in May 2026, it had been discovered that a number of support columns at the fifth basement level at Samseong Station had been constructed inadequately, making the targeted August 2026 opening unlikely.

In addition, Samseong Station has been further delayed, and, as of May 2026, is not scheduled to open until October 2028.

Furthermore, a southern extension of the line from Dongtan to PyeongtaekJije Station had been in the planning stage for approximately one month before the opening of the line's opening.

Current Routes Seoul Station — Unjeongjungang Suseo — Dongtan

Stations Station Number Station name Transfer Line name Distance (km) Totaldistance (km) LocationDate Opened English HangulX101 Unjeongjungang GTX-A — 0.0 Gyeonggi Province Paju28 December 2024 X102 KINTEX 6.7 6.7 Goyang X103 Daegok 6.9 13.6X104 Changneung 6.2 19.82030 X105 Yeonsinnae 3.7 (9.9) 23.5 Seoul Eunpyeong28 December 2024 X106 Seoul Station 9.5 33.0 JungX107 Samseong 10.1 43.1 Gangnam April 2028X108 Suseo 5.2 (15.3) 48.330 March 2024X109 Seongnam Suseo–Pyeongtaek HSR (shared) 10.7 59.0 Gyeonggi Province SeongnamX110 Guseong 11.0 70.0 Yongin29 June 2024X111 Dongtan 11.1 81.1 Hwaseong30 March 2024

GTX-B Construction of GTX Line B commenced on March 7, 2024. It is planned to be completed by 2030.

Stationnumber Station name Transfer Line name Distance Totaldistance Location English Hangul scope="row" rowspan="13" Songdo Station GTX-B — 0.0 Incheon Yeonsu Incheon City Hall — — Namdong Bupyeong — — Bupyeong Bucheon Stadium — — Gyeonggi Bucheon Sindorim — — Seoul Guro Yeouido — — Yeongdeungdo Yongsan — — Yongsan Seoul Station — — Jung Cheongnyangni — — Dongdaemun Sangbong — — Jungnang Byeollae Gyeongchun Line (shared) — — Gyeonggi Namyangju Pyeongnaehopyeong — — Maseok — —

GTX-C Construction of GTX Line C commenced on January 25, 2024. It is planned to be completed by 2028. According to the latest plans and following the selection of a preferred bidder for the construction of this line, two additional stations, Indeogwon Station and Wangsimni Station are likely to be added to the line. An additional southern extension past Suwon to Cheonan-Asan is also in consideration.

Stationnumber Station name Transfer Line name Distance Totaldistance Location English Hangul scope="row" rowspan="10" Suwon Gyeongbu Line (shared)Gwacheon Line (shared) — 0.0 Gyeonggi Suwon Geumjeong — — Gunpo Gwacheon GTX-C — — Gwacheon Yangjae — — Seoul Gangnam Samseong — — Cheongnyangni — — Dongdaemun Kwangwoon University — — Nowon Chang-dong — — Dobong Uijeongbu Gyeongwon Line (shared) — — Gyeonggi Uijeongbu Deokjeong — — Yangju

Additional plans for other lines

Plans for a Line D were announced in 2021 by the previous government. However, the proposed route faced a lot of opposition, and has not been approved yet. The new government of Yoon Suk-yeol has pledged to build three new lines (Lines D, E and F), for which the routes have not been decided yet, but which would likely include plans for a longer Line D than the one announced by the previous government. Plans for a Line G and H that will expand to the northern and southwestern regions of Gyeonggi Province have also been announced.

Stationnumber Station name Transfer Line name Distance Totaldistance Location English Hangul scope="row" rowspan="10" Janggi GTX-D — 0.0 Gyeonggi Gimpo Geomdan — Incheon Seo Gyeyang — — Gyeyang Daejang — — Gyeonggi Bucheon Dangarae — —

Criticism Critics argue that the GTX project would further concentrate social and economic power towards Seoul, leading to increased primacy and the collapse of other provincial cities.

Notes

References

External links SG Rail – official website