Line 4
Seoul Metro 4000 series EMU in July 2023

Korail Class 341000 series EMU in April 2020
Overview
Native name4호선(四號線)
Sa Hoseon
StatusOperational
Termini
Stations51
26-Seoul Metro
22-Korail
03-Namyangju City Urban Corporation
Service
TypeRapid transit
SystemSeoul Metropolitan Subway
Operator(s)Seoul Metro, Korail, Namyangju City Urban Corporation
History
Opened20 April 1985 (1985-04-20)
Technical
Line length72.1 km (44.8 mi)
31.7 km (19.7 mi) Seoul Metro[1]
40.4 km (25.1 mi) Korail[2]
Number of tracks2
Electrification1,500 V DC (Jinjeop to Namtaeryeong)
25 kV AC at 60 Hz (Seonbawi to Oido)
Operating speed100 km/h (62 mph)

Seoul Subway Line 4 (dubbed The Light Blue Line) of the Seoul Metropolitan Subway is a long line crossing from the southwest to the northeast across the Seoul National Capital Area. The central section in Seoul City is operated by Seoul Metro with some trains offering through service to Korail's Ansan and Gwacheon Lines.[3] The southern terminus (Oido) is in Jeongwang 4-dong, Siheung City, and the northern terminus (Jinjeop) is in Jinjeop-eup, Namyangju-si, Gyeonggi-do; the newly built northern section (officially called the Jinjeop Line) is correspondingly owned by a company owned by Namyangju-si, with operations contracted to Seoul Metro. In 2022, the Seoul Metro operated section had an annual ridership of 219,587,000 or about 601,608 passengers per day.[4]

Northbound trains that run on the Ansan and Gwacheon Lines terminate at Danggogae, except during night time where they short-turn at various stations. Southbound trains that run on the Ansan and Gwacheon Lines terminate at Oido or Ansan. All trains from Jinjeop short-turn at Sadang, though some short-turn trains to Sadang start at Danggogae or terminate one station south at Namtaeryeong.

Express train service stops at all stations between Danggogae and Sanbon, then at Sangnoksu, Jungang, Choji, Ansan, Jeongwang, and Oido. The express service only operates during rush hours on weekdays.

History

1985:

20 April: Line 4 is officially opened from Sanggye to Samseon-gyo.

1993:

21 April: The line is extended northward from Sanggye to Danggogae.

1994:

1 April: The line is extended southward from Sadang to Ansan when a section of the Gwacheon Line (from Seonbawi to Indeogwon) and Namtaeryeong Station open.

2000:

28 July: The line is extended westward from Ansan to Oido.

2003

18 July: Surisan Station opens as an in-fill station on the Ansan Line section.

2010

Ansan Line AM express service is launched in the northbound direction only (starting from Ansan). Trains stopped at Jungang, Sangnoksu, and Sanbon, before continuing local up to Danggogae.

2014

1 September: Southbound PM express service is launched (terminating at Ansan). Trains make the same stops as their AM express service counterparts.

2017

7 July: Express service is extended to Oido. In addition to the stops they made before, trains make all stops between Ansan and Oido.

2020

12 September: Express service is modified, with trains now stopping at Choji but skipping Singiloncheon.

2022:

19 March: The Jinjeop Line, a northward extension of Line 4, opens from Danggogae to Jinjeop.[5]

Future

Express services are planned to start skipping various stations north of Sanbon station by 2023 to cut travel times.[6]

Stations

Station
Number
Station Name
English
Station Name
Hangul
Station Name
Hanja
EX Transfer Line Name Distance
in km
Total
Distance
Location
405
Jinjeop
(Kyungbok University)
진접
(경복대)
Jinjeop Line
---
0.0
406
Onam 오남
2.1
2.1
407
Pungyang (2026) 풍양
2.6
4.7
408
ByeollaeByeolgaram 별내별가람별가람
5.2
9.9
409
Danggogae 당고개당고개 Makes all stops
Seoul Metro Line 4
4.4
14.3
410
Sanggye 상계
1.2
15.5
411
Nowon 노원
1.0
16.5
412
Chang-dong 창동
1.4
17.9
413
Ssangmun 쌍문
1.3
19.2
414
Suyu
(Gangbuk-gu Office)
수유
(강북구청)
1.5
20.7
415
Mia
(Seoul Cyber Univ.)
미아
(서울사이버대학)
1.4
22.1
416
Miasageori 미아사거리사거리
1.5
23.6
417
Gireum 길음
1.3
24.9
418
Sungshin Women's Univ.
(Donam)
성신여대입구
(돈암)
Ui LRT
1.4
26.3
419
Hansung Univ.
(Samseongyo)
한성대입구
(삼선교)
1.0
27.3
420
Hyehwa
(Seoul Nat’l Univ. Hospital)
혜화
(서울대학교병원)
0.9
28.2
421
Dongdaemun 동대문
1.5
29.7
422
Dongdaemun History & Culture Park
(DDP)
동대문역사문화공원
(DDP)
0.7
30.4
423
Chungmuro 충무로
1.3
31.7
424
Myeong-dong
(Woori Financial Town)
명동
(우리금융타운)
0.7
32.4
425
Hoehyeon
(Namdaemun Market)
회현
(남대문시장)
0.7
33.1
426
Seoul Station 서울역서울驛
Gyeongui–Jungang Line (Seoul Station branch)
Mugunghwa-ho and ITX-Saemaeul services
0.9
34.0
427
Sookmyung Women's Univ.
(Garwol)
숙대입구
(갈월)
1.0
35.0
428
Samgakji 삼각지
1.2
36.2
429
Sinyongsan
(AMOREPACIFIC)
신용산
(아모레퍼시픽)
0.7
36.9
430
Ichon
(National Museum of Korea)
이촌
(국립중앙박물관)
Gyeongui–Jungang Line
1.3
38.2
431
Dongjak
(Seoul National Cemetery)
동작
(현충원)
2.7
40.9
432
Chongshin Univ.
(Isu)
총신대입구
(이수)
1.8
42.7
433
Sadang
(Daehang Hospital)
사당
(대항병원)
1.1
43.8
434
Namtaeryeong 남태령
1.6
45.4
435
Seonbawi 선바위선바위
2.0
47.4
436
Seoul Racecourse Park 경마공원
1.0
48.4
437
Seoul Grand Park
(Seoul Land)
대공원
(서울랜드)
0.9
49.3
438
Gwacheon 과천
1.0
50.3
439
Government Complex Gwacheon 정부과천청사
1.0
51.3
440
Indeogwon 인덕원
3.0
54.3
441
Pyeongchon
(Hallym Univ. Sacred Heart Hospital)
평촌
(한림대성심병원)
1.6
55.9
442
Beomgye 범계범계
1.3
57.2
443
Geumjeong 금정
2.6
59.8
444
Sanbon
(Wonkwang Univ. Sanbon Hospital)
산본
(원광대산본병원)
2.3
62.1
445
Surisan 수리산
|
1.1
63.2
446
Daeyami 대야미
|
2.6
65.8
447
Banwol 반월
|
2.0
67.8
448
Sangnoksu
(Ansan Univ.)
상록수
(안산대학교)
3.7
71.5
449
Hanyang Univ. at Ansan 한대앞
|
Suin–Bundang
(shared)
Suin–Bundang Line
1.5
73.0
450
Jungang
(Seoul Institute of the Arts)
중앙
(서울예술대)
1.6
74.6
451
Gojan
(Korea Univ. Ansan Hospital)
고잔
(고대안산병원)
|
1.4
76.0
452
Choji
(Shin Ansan Univ.)
초지
(신안산대)
Seohae Line
1.5
77.5
453
Ansan 안산
1.8
79.3
454
Singiloncheon 신길온천
|
2.2
81.5
455
Jeongwang
(Tech Univ. of Korea)
정왕
(한국공학대)
2.9
84.4
456
Oido 오이도
Suin–Bundang Line
1.4
85.8
Seoul Metropolitan Subway Line 4
405 Jinjeop
Jinjeop Depot
(Transferred from Chang-dong Depot)
406 Onam
407 Pungyang
Wangsukcheon Bridge
408 ByeollaeByeolgaram
Northbound turnback
All trains from Oido terminates at Danggogae
409 Danggogae (
Jinjeop Line
Seoul Subway Line 4
)
410 Sanggye
411 Nowon
Chang-dong Depot
412 Chang-dong
413 Ssangmun
414 Suyu
415 Mia
416 Miasageori
417 Gireum
418 Sungshin Women's Univ. Ui LRT
419 Hansung Univ.
420 Hyehwa
421 Dongdaemun
422 Dongdaemun History & Culture Park
Link with Line 3
423 Chungmuro
424 Myeong-dong
425 Hoehyeon
426 Seoul Station Gyeongui–Jungang Line
Cancelled link with Line 1
427 Sookmyung Women's Univ.
428 Samgakji
429 Sinyongsan
430 Ichon Gyeongui–Jungang Line
431 Dongjak
432 Chongshin Univ.
433 Sadang
Southbound turnback for DC only trains
All trains from Jinjeop terminate at Sadang
434 Namtaeryeong (
Seoul Subway Line 4
Gwacheon Line
)
Right-hand running/1.5kV DC/Seoul Metro Section
Left-hand running/25kV AC/Korail Section
changeover
435 Seonbawi
436 Seoul Racecourse Park
437 Seoul Grand Park
438 Gwacheon
439 Government Complex Gwacheon
2027 Gwacheon Information Town
440 Indeogwon
441 Pyeongchon
442 Beomgye
443 Geumjeong (
Gwacheon Line
Ansan Line
)
444 Sanbon
445 Surisan
446 Daeyami
447 Banwol
448 Sangnoksu
449 Hanyang Univ. at Ansan Suin–Bundang Line
450 Jungang
451 Gojan
452 Choji Seohae Line
link with Seohae Line
453 Ansan
454 Singiloncheon
455 Jeongwang
456 Oido Suin–Bundang Line
Siheung Depot
Express services (Rush hours only)
All Stations to Danggogae
443 Geumjeong
444 Sanbon
448 Sangnoksu
450 Jungang Suin–Bundang Line
452 Choji Seohae Line
453 Ansan
Singiloncheon
455 Jeongwang
456 Oido Suin–Bundang Line

Depots, junctions, and points of interest

(from Jinjeop to Oido)

  • Jinjeop Depot (opening December 2024, will replace Changdong Depot for Seoul Metro-operated rolling stock)
  • Turnback siding (underground) after Danggogae Station
  • Changdong Depot (used for Seoul Metro class 4000, with non-revenue connection to Line 1)
  • Non-revenue connecting track to Line 3 before Chungmuro Station
  • Dongjak Bridge
  • Chongshin Univ. – Sadang scissors crossover
  • Hanyang University, ERICA Campus
  • Turnback siding (underground) after Sadang Station
  • Namtaeryong–Seonbawi track crossing point (flying crossover, switch from right to left-hand traffic, or vice versa)[a]
    • The voltage/current switches between DC 1,500 V ↔ AC 25,000 V
  • Non-revenue crossover to Line 1 after Geumjeong Station
  • Non-revenue connecting track to Seohae Line before Choji Station
  • Ansan Depot (used for simple maintenance of Korail Class 341000 train)
  • Siheung Depot (used for Korail Class 341000 maintenance and also for heavy maintenance of Korail Class 311000 trains operated on Line 1)
  • The largest scale of shell mounds in the South Korean west coast in Oido

Rolling stock

Current

Seoul Metro

  • Seoul Metro 4000 series
    • 1st generation, DC only: 4-01~4-26 (Restricted to Jinjeop-Sadang)
    • 1st generation, DC & AC: 4-51~4-71 (Retirement in Process)
    • 2nd generation: 4-81~4-85
    • 3rd generation: 4-50~4-54

Korail

  • Korail Class 341000 (ex-Korail Class 2030)
    • 1st generation: 341-01~341-25
    • 2nd generation: 341-26~341-30
      • Trains 341-27~341-29 are temporary running on Line 3.
    • 3rd generation: 341-31~341-37
    • 4th generation: 341-38~341-55
      • Trains 341-31~341-34, 341-36, 341-41, 341-44~341-45, 341-48~341-55 are temporary running on Line 1.


Former

Seoul Metro

  • Seoul Metro 3000 series (former 4000 series)

Korail

See also

Notes

a. One of only two subway directional crossovers in revenue service in the world, the other one located between Ho Man Tin station and To Kwa Wan station of the Tuen Ma line in Hong Kong.

References

  1. 지하철건설현황 [Status of Subway Construction] (in Korean). Seoul City Government. Archived from the original on 3 January 2016. Retrieved 22 February 2014.
  2. "Metro Lines & Trains in Operation". Korail. Retrieved 25 July 2014.
  3. "서울교통공사 블로그 : 네이버 블로그". blog.naver.com. Retrieved 31 May 2021.
  4. "서울시 지하철수송 통계". data.seoul.go.kr (in Korean). Retrieved 19 July 2022.
  5. "EzPDF WebViewer".
  6. "4호선 금정~사당 급행열차 추진된다". 중부일보 – 경기·인천의 든든한 친구. 11 July 2017.
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