Seoul Subway Line 4

Seoul Subway Line 4 of the Seoul Metropolitan Subway is a long line crossing from the southwest to the northeast across the Seoul Metropolitan 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. 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 2021, the Seoul Metro operated section (excluding the Jinjeop Line) had an annual ridership of 219,587,000 or about 601,608 passengers per day.

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 Sadang.

1993:

:21 April: The line is extended northward from Sanggye to Danggogae, and southward from Sadang to Namtaeryeong.

Future

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

Stations

{| class="wikitable"

! Station<br />number

! width="210pt" | Station name<br />

! width="130pt" | Station name<br />

! width="35pt" | <span style="color:#f00;">EX</span>

! width="235pt" colspan="3"| Transfer

! Line name

! Distance<br />

! Total<br />distance

! colspan="2" | Location

|- style="background:#; height: 2pt"

| colspan="13" |

| Jinjeop <br><small>(Kyungbok University)</small>

| ||

! rowspan=4 |

| colspan="3"|

| rowspan="4" width="70pt" |

| rowspan="4" width="75pt" |

| rowspan="4" width="100pt" |

| Onam

| ||

| colspan="3"|

|- bgcolor="lightgrey"

| Pungyang <small>(2026)</small>

| 풍양 ||

| colspan="3"|

| ByeollaeByeolgaram

| || 별가람

| colspan="3"|

| Buramsan

| ||

| rowspan=35 align=center | Makes all stops

| colspan="3"|

| rowspan="26" width="70pt" |

| rowspan="26" width="75pt" |

| rowspan="3" width="100pt" |

| Sanggye

| ||

| colspan="3"|

| Nowon

| ||

| colspan="3"|

| Chang-dong

| ||

| colspan="3"|

| rowspan="2" |

| Ssangmun

| ||

| colspan="3"|

| Suyu <br /><small>(Gangbuk-gu Office)</small>

| ||

| colspan="3"|

| rowspan="3" |

| Mia <br /><small>(Seoul Cyber Univ.)</small>

| ||

| colspan="3"|

| Miasageori

| || 거리

| colspan="3"|

| Gireum

| ||

| colspan="3"|

| rowspan="3" |

| Sungshin Women's Univ. <br /><small>(Donam)</small>

| ||

| colspan="3"|

| Hansung Univ. <br /><small>(Samseongyo)</small>

| ||

| colspan="3"|

| Hyehwa <br /><small>(Seoul Nat’l Univ. Hospital)</small>

| ||

| colspan="3"|

| rowspan="2" |

| Dongdaemun

| ||

| colspan="3"|

| Dongdaemun History & Culture Park <br><small>(DDP)</small>

| ||

| colspan="3"|

| rowspan="4" |

| Chungmuro

| ||

| colspan="3"|

| Myeong-dong <br><small>(Woori Financial Town)</small>

| ||

| colspan="3"|

| Hoehyeon <br /><small>(Namdaemun Market)</small>

| ||

| colspan="3"|

| Seoul Station

| || 서울驛

| colspan="3"| <br /> <small>(Seoul Station branch)</small><br /> <small>Mugunghwa-ho and ITX-Saemaeul services</small><br />100x12px|link=KTX

| rowspan="5" |

| Sookmyung Women's Univ. <br /><small>(Garwol)</small>

| ||

| colspan="3"|

| Samgakji

| ||

| colspan="3"|

| Sinyongsan <br><small>(AMOREPACIFIC)</small>

| ||

| colspan="3"|

| Ichon <br /><small>(National Museum of Korea)</small>

| ||

| colspan="3"|

| Dongjak <br /><small>(Seoul National Cemetery)</small>

| ||

| colspan="3"|

| rowspan="3" |

| Chongshin Univ. <br><small>(Isu)</small>

| ||

| colspan="3"|

| Sadang

| ||

| colspan="3"|

| Namtaeryeong

| ||

| colspan="3"|

| Seonbawi

| || 선바위

| colspan="3"|

| rowspan="8" |

| rowspan="22" |

| rowspan="5" |

| Seoul Racecourse Park

| ||

| colspan="3"|

| Seoul Grand Park <br /><small>(Seoul Land)</small>

| ||

| colspan="3"|

| Gwacheon

| ||

| colspan="3"|

| Government Complex Gwacheon

| ||

| colspan="3"|

| Indeogwon

| ||

| colspan="3"|

| rowspan="3" |

| Pyeongchon <br><small>(Hallym Univ. Sacred Heart Hospital)</small>

| ||

| colspan="3"|

| Beomgye

| || 범계

| colspan="3"|

| Geumjeong

| ||

| colspan="3"|

| rowspan="14" |

| rowspan="4" |

| Sanbon <br><small>(Wonkwang Univ. Sanbon Hospital)</small>

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

| colspan="3"|

| Surisan

| ||

| <div class="center"><span style="color:#f00;"><nowiki>|</nowiki></span></div>

| colspan="3"|

| Daeyami

| ||

| <div class="center"><span style="color:#f00;"><nowiki>|</nowiki></span></div>

| colspan="3"|

| Banwol

| ||

| <div class="center"><span style="color:#f00;"><nowiki>|</nowiki></span></div>

| colspan="3"|

| rowspan="8" |

| Sangnoksu <br><small>(Ansan Univ.)</small>

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

| colspan="3"|

| Hanyang Univ. at Ansan

| || 앞

| <div class="center"><span style="color:#f00;"><nowiki>|</nowiki></span></div>

|style="color:white;background-color:#; width: 1pt" rowspan="8"|

|rowspan="8" style="width:60px;"|Suin–Bundang<br />

| Jungang <br><small>(Seoul Institute of the Arts)</small>

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

| Gojan <br><small>(Korea Univ. Ansan Hospital)</small>

| ||

| <div class="center"><span style="color:#f00;"><nowiki>|</nowiki></span></div>

| Choji <br><small>(Shin Ansan Univ.)</small>

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

| Ansan

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

| Singiloncheon

| ||

| <div class="center"><span style="color:#f00;"><nowiki>|</nowiki></span></div>

| Jeongwang <br><small>(Tech Univ. of Korea)</small>

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

| rowspan="2" |

| Oido

| ||

| <div class="center"><span style="color:#f00;">●</span></div>

|- style="background:#; height: 2pt"

| colspan="13" |

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)
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)(Retired)
1st generation, DC & AC: 4-51~4-71 (Retired)
2nd generation: 4-81~4-85
3rd generation: 4-50~4-70
4th generation: 4-01~4-26

Korail

Korail Class 341000 (ex-Korail Class 2030)
3rd generation: 341-31~341-37
4th generation: 341-38~341-60
Trains 341-53~341-55 are temporary running on Line 1.

File:20230708 서울교통공사 4000호대 3차 483편성.jpg|Seoul Metro 4000 series EMU (2nd generation)

File:Korail Class 341000 (2nd generation).jpg|Korail Class 341000 (2nd generation)

File:Korail341936.jpg|Korail Class 341000 (3rd generation)

</gallery>

Former

Seoul Metro

Seoul Metro 3000 series (former 4000 series)
Wide-width GEC Traction chopper resistor controlled electric car (1985–1993; transferred to Seoul Subway Line 3)

Korail

Korail Class 1000 (Ansan Line only, transferred to Seoul Subway Line 1)
Korail Class 341000 1st generation: 341-01~341-25, (1993-2024)
Korail Class 341000 2nd generation: 341-26~341-30, (1999-2025)

File:서울교통공사 4000호대 초퍼제어 전동차.jpg|Seoul Metro (former) 4000 series GEC stabled at Changdong Depot

File:Seoul_Metro_Line_3_train_(GEC)_arriving_at_Oksu.jpg| Seoul Metro 3000 series GEC (Former 4000 series GEC), June 2013

File:Korail EMU series 1000(1).JPG|Korail Class 1000 (2nd batch)

File:Korail_Line_4_train_at_Geumjeong.JPG|Korail Class 341000 (1st generation)

</gallery>

Ridership

{| class="wikitable" style="width:100%"

! colspan="4" align="center" |Seoul Subway Line 4 Ridership

| colspan="4" align="center" bgcolor= |

! style="width:20%" |Year

! style="width:20%" |Ridership

!Change (%)

! style="width:40%" |Remarks

| align="center" |2026

| align="right" |

| align="center" |2025

| align="right" |290,905,000

| 0.5

| align="center" |2024

| align="right" |289,474,890

| 3.7

| align="center" |2023

| align="right" |279,191,000

| 12.1

| align="center" |2022

| align="right" |248,951,000

| 13.4

|Expansion to Jinjeop opens

| align="center" |2021

| align="right" |219,587,000

| 1.3

| align="center" |2020

| align="right" |222,536,000

| 31.9

COVID-19 pandemic
Through service with Suin-Bundang Line begins

| align="center" |2019

| align="right" |326,793,000

| 0.3

| align="center" |2018

| align="right" |325,897,000

| 3.5

| align="center" |2017

| align="right" |337,778,000

| 2.6

| align="center" |2016

| align="right" |346,954,000

| 14.7

|Highest on record

| align="center" |2015

| align="right" |302,565,000

| 1.8

| align="center" |2014

| align="right" |308,201,000

| 0.6

| align="center" |2013

| align="right" |306,485,000

| 0.1

| align="center" |2012

| align="right" |306,926,000

| 0.6

| align="center" |2011

| align="right" |308,843,000

| 1.7

| align="center" |2010

| align="right" |303,625,000

| 2.2

| align="center" |2009

| align="right" |297,132,000

| 0.6

| align="center" |2008

| align="right" |295,222,000

| 1.1

| align="center" |2007

| align="right" |298,621,000

| 1.9

| align="center" |2006

| align="right" |304,327,000

| 0.7

| align="center" |2005

| align="right" |306,528,000

| 1.9

| align="center" |2004

| align="right" |312,581,000

| 2.1

| align="center" |2003

| align="right" |306,222,000

| 1.5

| align="center" |2002

| align="right" |310,747,000

| 1.7

| align="center" |2001

| align="right" |305,665,000

| 2.3

| align="center" |2000

| align="right" |298,717,000

| 0.7

|Expansion to Oido opens

| align="center" |1999

| align="right" |296,685,000

| 0.5

| align="center" |1998

| align="right" |298,268,000

| 2

| align="center" |1997

| align="right" |304,436,000

| -

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

External links

Korail

History

Future

Stations

Depots, junctions, and points of interest

Rolling stock

Current

Seoul Metro

Korail

Former

Seoul Metro

Korail

Ridership

See also

Notes

References

External links