Great Train eXpress

GTX-A
GTX-A
	A GTX-A A000 series EMU
Overview
Native name	수도권 광역급행철도 A노선
Owner	Government of South Korea
Locale	Seoul
Termini	Unjeongjungang; Suseo; ; Seoul; Dongtan; ;
Stations	9
Color on map	Lilac
Service
Type	Commuter rail
Services	2
Operator(s)	Great Train eXpress A-Line Operation Co., Ltd.
History
Opened	30 March 2024; 2 years ago
Technical
Number of tracks	2
Character	Underground
Track gauge	1,435 mm (4 ft 8+1⁄2 in)
Electrification	25 kV/60 Hz
Operating speed	180 km/h (110 mph)

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 30 km (19 mi) of the line are expected to share the same rail as the SRT, and an additional 9 km (5.6 mi) 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)	Total distance (km)	Location		Date Opened
Station Number	English	Hangul	Transfer	Line name	Distance (km)	Total distance (km)	Location		Date Opened

X101	Unjeongjungang	운정중앙		GTX-A	—	0.0	Gyeonggi Province	Paju	28 December 2024
X102	KINTEX	킨텍스			6.7	6.7		Goyang
X103	Daegok	대곡			6.9	13.6
X104	Changneung	창릉			6.2	19.8			2030
X105	Yeonsinnae	연신내			3.7 (9.9)	23.5	Seoul	Eunpyeong	28 December 2024
X106	Seoul Station	서울역			9.5	33.0		Jung	28 December 2024
X107	Samseong	삼성			10.1	43.1		Gangnam	April 2028
X108	Suseo	수서			5.2 (15.3)	48.3		Gangnam	30 March 2024
X109	Seongnam	성남		Suseo–Pyeongtaek HSR (shared)	10.7	59.0	Gyeonggi Province	Seongnam	30 March 2024
X110	Guseong	구성			11.0	70.0		Yongin	29 June 2024
X111	Dongtan	동탄			11.1	81.1		Hwaseong	30 March 2024

GTX-B

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

Station number	Station name		Transfer	Line name	Distance	Total distance	Location
Station number	English	Hangul	Transfer	Line name	Distance	Total distance	Location

TBA	Songdo Station	송도		GTX-B	—	0.0	Incheon	Yeonsu
	Incheon City Hall	인천시청			—	—		Namdong
	Bupyeong	부평			—	—		Bupyeong
	Bucheon Stadium	부천종합운동장			—	—	Gyeonggi	Bucheon
	Sindorim	신도림			—	—	Seoul	Guro
	Yeouido	여의도			—	—		Yeongdeungdo
	Yongsan	용산			—	—		Yongsan
	Seoul Station	서울역			—	—		Jung
	Cheongnyangni	청량리			—	—		Dongdaemun
	Sangbong	상봉			—	—		Jungnang
	Byeollae	별내		Gyeongchun Line (shared)	—	—	Gyeonggi	Namyangju
	Pyeongnaehopyeong	평내호평			—	—
	Maseok	마석			—	—

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.

Station number	Station name		Transfer	Line name	Distance	Total distance	Location
Station number	English	Hangul	Transfer	Line name	Distance	Total distance	Location

TBA	Suwon	수원		Gyeongbu Line (shared) Gwacheon Line (shared)	—	0.0	Gyeonggi	Suwon
	Geumjeong	금정		Gyeongbu Line (shared) Gwacheon Line (shared)	—	—		Gunpo
	Gwacheon	과천		GTX-C	—	—		Gwacheon
	Yangjae	양재			—	—	Seoul	Gangnam
	Samseong	삼성			—	—		Gangnam
	Cheongnyangni	청량리			—	—		Dongdaemun
	Kwangwoon University	광운대			—	—		Nowon
	Chang-dong	창동			—	—		Dobong
	Uijeongbu	의정부		Gyeongwon Line (shared)	—	—	Gyeonggi	Uijeongbu
	Deokjeong	덕정		Gyeongwon Line (shared)	—	—	Gyeonggi	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.

Station number	Station name		Transfer	Line name	Distance	Total distance	Location
Station number	English	Hangul	Transfer	Line name	Distance	Total distance	Location

TBA	Janggi	장기		GTX-D	—	0.0	Gyeonggi	Gimpo
	Geomdan	검단				—	Incheon	Seo
	Gyeyang	계양			—	—	Incheon	Gyeyang
	Daejang	대장			—	—	Gyeonggi	Bucheon
	Dangarae	당아래			—	—	Gyeonggi	Bucheon

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

↑ Bongeunsa station will be merged with Samseong Station.
↑ Not to be confused with Songdo Station on the Suin-Bundang Line. This station will be located in Songdo International City and offer transfer to Incheon National University Station.
↑ Sangbong station will be merged with Mangu station.
↑ This station is just named Gwacheon station, but located at Government Complex Gwacheon station.

References

↑ "[Graphic News] GTX lines expansion". The Korea Herald. January 31, 2024. Retrieved March 31, 2024.
↑ "드디어 베일 벗은 '2기 GTX'…D·E·F 노선 '이곳' 지난다". 한국경제. January 25, 2024. Retrieved March 31, 2024.
↑ "파주~강남~동탄 GTX A노선 사업 오늘 착공". Naver (in Korean). Korean Broadcasting System. December 27, 2018. Retrieved July 8, 2021.
↑ "2025년 개통도 턱없다…'비운의 노선' GTX-A". m.post.naver.com (in Korean). Retrieved February 21, 2022.
↑ "GTX-A commuter line to launch 1st leg Saturday". m.koreaherald.com. March 29, 2024. Retrieved March 31, 2024.
↑ Hong, Chan-seon (May 18, 2024). "[단독]GTX-A 동탄-수서 '빈 퍼즐' 구성역, 내달 29일 개통" [[Exclusive] GTX-A Dongtan-Suseo Section: Guseong Station to Open on the 29th of Next Month]. Newsis (in Korean). Retrieved July 25, 2026.
↑ 최종훈 (December 27, 2024). "파주 운정중앙역~서울역 '21분 30초'…GTX-A 서북부 구간 28일 개통". 한겨레 (in Korean). Retrieved December 28, 2024.
↑ Tebay, Andy (January 5, 2023). "Tunnelling completed in Seoul for GTX-A line". International Railway Journal. Retrieved January 26, 2023.
1 2 "열차시간표". GTX Official Website (in Korean). Archived from the original on December 30, 2024. Retrieved January 2, 2025.
↑ "Seoul GTX Line A train contract awarded". Railway Gazette International. March 20, 2020. Retrieved December 27, 2024.
↑ 조계완 (March 29, 2024). "[Q&A] GTX-A 30일 첫 운행…K-패스 O, 기후동행카드 X". [Q&A] GTX-A 30일 첫 운행…K-패스 O, 기후동행카드 X (in Korean). Retrieved June 13, 2024.
1 2 Kwak, Joseph (May 18, 2026). "S. Korea launches special inspection to investigate construction defects in Seoul's GTX station". Asia First News Agency. Retrieved July 25, 2026.
↑ "GTX-A 삼성역, 2028년에나 개통…최소 3년 노선분리".
↑ Tebay, Andy (February 23, 2024). "Agreement signed to speed up GTX extension projects". International Railway Journal. Retrieved July 25, 2026.
↑ "GTX-B breaks ground for 30-min Seoul-Incheon commute". The Korea Herald. March 7, 2024. Retrieved March 31, 2024.
↑ "Construction of Seoul express Line C starts as part of the 'first year of the GTX era'". Railway Gazette International. February 2, 2024. Retrieved March 31, 2024.
↑ Nam, Kyung-don (January 31, 2024). "[Graphic News] GTX lines expansion". The Korea Herald (in Korean). Retrieved July 25, 2026.
↑ 뉴시스 (April 1, 2024). "GTX 플러스 노선안 공개…포천~인천, 파주~위례신도시 연결". 뉴시스 (in Korean). Retrieved June 29, 2024.
↑ Donggyu, Seong (March 19, 2014). "'문제 투성이' GTX사업…우려 확산" [GTX project in "full of problems" - Lots of Concerns Appear]. Newsway (in Korean). Seoul. Retrieved January 18, 2021.

External links

SG Rail – official website (in Korean)

[15] Bongeunsa station will be merged with Samseong Station.

[17] Not to be confused with Songdo Station on the Suin-Bundang Line. This station will be located in Songdo International City and offer transfer to Incheon National University Station.

[18] Sangbong station will be merged with Mangu station.

[21] This station is just named Gwacheon station, but located at Government Complex Gwacheon station.

[1] "[Graphic News] GTX lines expansion". The Korea Herald. January 31, 2024. Retrieved March 31, 2024.

[2] "드디어 베일 벗은 '2기 GTX'…D·E·F 노선 '이곳' 지난다". 한국경제. January 25, 2024. Retrieved March 31, 2024.

[3] "파주~강남~동탄 GTX A노선 사업 오늘 착공". Naver (in Korean). Korean Broadcasting System. December 27, 2018. Retrieved July 8, 2021.

[:0-4] "2025년 개통도 턱없다…'비운의 노선' GTX-A". m.post.naver.com (in Korean). Retrieved February 21, 2022.

[5] "GTX-A commuter line to launch 1st leg Saturday". m.koreaherald.com. March 29, 2024. Retrieved March 31, 2024.

[6] Hong, Chan-seon (May 18, 2024). "[단독]GTX-A 동탄-수서 '빈 퍼즐' 구성역, 내달 29일 개통" [[Exclusive] GTX-A Dongtan-Suseo Section: Guseong Station to Open on the 29th of Next Month]. Newsis (in Korean). Retrieved July 25, 2026.

[7] 최종훈 (December 27, 2024). "파주 운정중앙역~서울역 '21분 30초'…GTX-A 서북부 구간 28일 개통". 한겨레 (in Korean). Retrieved December 28, 2024.

[8] Tebay, Andy (January 5, 2023). "Tunnelling completed in Seoul for GTX-A line". International Railway Journal. Retrieved January 26, 2023.

[:1-9] 1 2 "열차시간표". GTX Official Website (in Korean). Archived from the original on December 30, 2024. Retrieved January 2, 2025.

[10] "Seoul GTX Line A train contract awarded". Railway Gazette International. March 20, 2020. Retrieved December 27, 2024.

[11] 조계완 (March 29, 2024). "[Q&A] GTX-A 30일 첫 운행…K-패스 O, 기후동행카드 X". [Q&A] GTX-A 30일 첫 운행…K-패스 O, 기후동행카드 X (in Korean). Retrieved June 13, 2024.

[:2-12] 1 2 Kwak, Joseph (May 18, 2026). "S. Korea launches special inspection to investigate construction defects in Seoul's GTX station". Asia First News Agency. Retrieved July 25, 2026.

[13] "GTX-A 삼성역, 2028년에나 개통…최소 3년 노선분리".

[14] Tebay, Andy (February 23, 2024). "Agreement signed to speed up GTX extension projects". International Railway Journal. Retrieved July 25, 2026.

[16] "GTX-B breaks ground for 30-min Seoul-Incheon commute". The Korea Herald. March 7, 2024. Retrieved March 31, 2024.

[19] "Construction of Seoul express Line C starts as part of the 'first year of the GTX era'". Railway Gazette International. February 2, 2024. Retrieved March 31, 2024.

[20] Nam, Kyung-don (January 31, 2024). "[Graphic News] GTX lines expansion". The Korea Herald (in Korean). Retrieved July 25, 2026.

[22] 뉴시스 (April 1, 2024). "GTX 플러스 노선안 공개…포천~인천, 파주~위례신도시 연결". 뉴시스 (in Korean). Retrieved June 29, 2024.

[23] Donggyu, Seong (March 19, 2014). "'문제 투성이' GTX사업…우려 확산" [GTX project in "full of problems" - Lots of Concerns Appear]. Newsway (in Korean). Seoul. Retrieved January 18, 2021.