Editing Seoul Subway Line 1 (section)

{{short description|Subway line in Seoul, South Korea}}
{{Infobox rail line
| box_width                       = 22em
| color                           = {{rcr|Seoul Metropolitan Subway|1}}
| name                            = Line 1
| native_name                     = {{Lang|ko|1호선(一號線)}}<br />''Il Hoseon''
| logo                            = [[File:South Korea subway logo.svg|x40px]] [[File:Seoul Metro Line 1.svg|x40px]]
| logo_alt                        = 
| image                           = [[File:Korail Class 312000.png|265px]] [[File:Seoul Metro Line 1 train leaving Geumjeong.jpg|265px]]
| image_width                     = 
| image_alt                       = 
| caption                         = [[Korail Class 311000]] series EMU in February 2021 (top)<br />[[Seoul Metro 1000 series (VVVF)|Seoul Metro 1000 series]] EMU in December 2017 (bottom)
| type                            = [[Rapid transit]] / [[Commuter Rail]]
| system                          = [[Seoul Metropolitan Subway]]
| status                          = Operational
| locale                          = [[Seoul Metropolitan Area]]
| start                           = [[Yeoncheon station|Yeoncheon]]
| end                             = [[Incheon station|Incheon]] / [[Sinchang station|Sinchang]] / [[Gwangmyeong station|Gwangmyeong]] / [[Seodongtan station|Seodongtan]]
| stations                        = 102<br />Seoul Metro: 10<br />Korail: 92
| routes                          = '''Local:'''<br>Yeoncheon / Soyosan / Dongducheon ↔ Incheon,<br>Kwangwoon U ↔ Seodongtan / Cheonan / Sinchang,<br>Yeongdeungpo ↔ Gwangmyeong<br>'''Express:'''<br>Cheongnyangni ↔ Cheonan / Sinchang,<br>Dongducheon ↔ Incheon<br><small>(AM Rush & off-peak weekdays)</small>,<br>Yongsan ↔ Dongincheon,<br>Seoul Station ↔ Cheonan/Sinchang<br><small>(weekday RH, peak direction only)</small>
| open                            = August 15, 1974
| close                           = 
| owner                           = [[Seoul Special City]],<br>[[Government of South Korea|South Korean Government]]
| operator                        = [[Seoul Metro]], [[Korail]]
| character                       = 
| depot                           = 
| stock                           = 
| linelength_km                   = 
| linelength                      = {{convert|218.3|km|abbr=on}}<br />Seoul Metro: {{convert|7.8|km|abbr=on}}<ref name="Seoul-Subway-stats" /> <br />Korail: {{convert|210.5|km|abbr=on}}
| tracklength_km                  = 
| tracklength                     = 
| gauge                           = {{RailGauge|sg|allk=on}}
| minradius                       = 
| routenumber                     = 
| linenumber                      = 1
| electrification                 = 1,500 V DC<br><small>(Seoul Metro section)</small><br>25 kV AC at 60 Hz <br><small>(Korail section)</small>
| speed_km/h                      = 
| speed                           = {{convert|110|km/h|mph|abbr=on}}
| elevation_m                     = 
| elevation                       = 
| website                         = 
| map                             = {{routemap
| title = {{RouteBox|Soyosan – Sinchang|Seoul Subway Line 1|#{{rcr|Seoul Metropolitan Subway|1}}}}
| title_bg =
| title_color =
| collapse =
| inline = yes
| map =
CONTg~~[[Gyeongwon Line]]
WECHSEL~~↑[[Yeoncheon station|Yeoncheon]]/[[Dongducheon station|Dongducheon]]↓
uBHF~~0.0~~[[Soyosan station|Soyosan]]
uBHF~~2.5~~[[Dongducheon station|Dongducheon]]
uHST~~4.1~~[[Bosan station|Bosan]]
uBHF~~5.5~~[[Dongducheon Jungang station|Dongducheon Jungang]]
uHST~~6.5~~[[Jihaeng station|Jihaeng]]
uSTR
uBHF~~12.1~~Deokjeong
uHST~~15.0~~Deokgye
uBST~~ ~~ ~~Majeon Signal Box
uBHF~~20.3~~[[Yangju station|Yangju]]
uHST~~21.9~~Nogyang
CONTgq\mvSTR+r-SHI1+r\~~←[[Gyooe Line]]
\mvSTR!~ulv-BHF\~~23.2~~[[Ganeung station|Ganeung]]
\SHI1+r!~uSHI1+l\
uBHF~~24.4~~[[Uijeongbu station|Uijeongbu]]
uHST~~26.0~~[[Hoeryong station|Hoeryong]] {{rint|seoul|uij}}
uHST~~27.4~~[[Mangwolsa station|Mangwolsa]]
\uSTR+GRZq\CONTg olive~~↑[[Uijeongbu]]/[[Seoul]]↓
\uBHF!~HUBaq\BHF olive!~HUBeq~~29.7~~[[Dobongsan station|Dobongsan]] {{rint|seoul|7}}
\uBHF\CONTf olive~~30.9~~[[Dobong station|Dobong]]
uBHF~~32.2~~[[Banghak station|Banghak]]
hCONTgq blue\uBHF!~HSTq blue!~lhBHFq\hCONTfq blue~~33.9~~[[Chang-dong station|Chang-dong]] {{rint|seoul|4}}
uHST~~34.9~~[[Nokcheon station|Nokcheon]]
uHST~~36.3~~[[Wolgye station|Wolgye]]
\SPLag+xl!~uSHI1r\exCONTfq~~formal [[Gyeongchun Line]]
\umvBHF\~~37.4~~[[Kwangwoon University station|Kwangwoon Univ.]]
\umvSTR!~ulvBHF-\~~38.5~~[[Seokgye station|Seokgye]] {{rint|seoul|6}}
\v-STRl!~umvSTR\STR+r
\umvSTR\KDSTe~~ ~~ ~~Imun Rail Yard
\umvSTR!~ulvBHF-\~~39.9~~[[Sinimun station|Sinimun]]
\umvSHI1l-STRl\CONTfq~~ ~~ ~~[[Mangu Line]]({{rcb|Seoul Metropolitan Subway|Gyeongchun|inline=yes}})→
\uBHF\~~40.7~~[[Hankuk University of Foreign Studies station|Hankuk Univ. of Foreign Studies]]
\uSTR\CONTg cyan~~{{rcb|Seoul Metropolitan Subway|Gyeongjung|inline=yes}} {{rcb|Seoul Metropolitan Subway|Gyeongchun|inline=yes}}→
\uBHF!~HUBaq\BHF cyan!~HUBeq~~41.5~~[[Hoegi station|Hoegi]]
\uSTR+GRZq\STR cyan~~↑[[Alternating current|AC]] section/[[Direct current|DC]] section↓ (neutral section)
\uSTR!~POINTERg@fq\STR cyan
uKRW+l\STR cyan!~uKRWr\STR cyan!~POINTERg@fq~~{{rcb|Seoul Metropolitan Subway|Gyeongjung|inline=yes}} {{rcb|Seoul Metropolitan Subway|Gyeongchun|inline=yes}}
utSTRa\KRWgl+l!~STR cyan\KRWgr+r!~STR cyan
utBHF!~HUBaq\BHF cyan!~HUBq\BHF cyan!~HUBeq~~42.9~~[[Cheongnyangni station|Cheongnyangni]]
utSTR\STR cyan\KDSTe cyan
utSTR2\STRl cyan!~utSTRc3\CONTfq cyan~~{{rcb|Seoul Metropolitan Subway|Gyeongjung|inline=yes}}→
utSTRc1\utSTR+4\
utHST~~43.9~~[[Jegi-dong station|Jegi-dong]]
\utSTR\utSTR+l~~ ~~ ~~{{rint|seoul|2}} connection line→
\utBHF!~HUBaq\uetBHF!~HUBeq~~44.8~~[[Sinseol-dong station|Sinseol-dong]] {{rint|seoul|2}} {{rint|seoul|ui}}
\utKRWg+l\utKRWr
utBHF~~45.5~~[[Dongmyo station|Dongmyo]] {{rint|seoul|6}}~~ ~~Since 2005
utBHF~~46.1~~[[Dongdaemun station|Dongdaemun]] {{rint|seoul|4}}
utHST~~46.9~~[[Jongno 5(o)-ga station|Jongno 5(o)-ga]]
utBHF~~47.8~~[[Jongno 3(sam)-ga station|Jongno 3(sam)-ga]] {{rint|seoul|3}} {{rint|seoul|5}}
utHST~~48.6~~[[Jonggak station|Jonggak]]
utBHF~~49.6~~[[City Hall station (Seoul)|City Hall]] {{rint|seoul|2}}
\CONT4+f!~utBS2c1\utBS2+r\tSTR+l blue~~(↖)[[Gyeongui Line]], {{rint|seoul|4}}(→)
tKBHFa sky!~HUBaq\BHFSPLa!~HUBq\utBHF!~HUBq\tBHF blue!~HUBeq~~50.7~~[[Seoul Station]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}} {{nowrap|[[File:KTX logo.svg|100x12px|link=KTX]]}}
tSTRr sky\uv-STR2!~vSTR\utSTRe!~uSTRc3\tSTRl blue~~(←){{rint|seoul|arx}}, {{rint|seoul|4}}(→)
vSTR!~uSTRc1\uSTR+4!~uSTR+GRZq~~↑[[Direct current|DC]] section/[[Alternating current|AC]] section↓ (neutral section)
STR+l\vSTRr-!~vSTR\uHST\~~52.4~~[[Namyeong station|Namyeong]]
STRl\vKRZu\umKRZu\STR+r
CONTgq cyan\vKRZu!~STRq cyan\uKRZu!~STRq cyan\STR!~STR+r cyan~~←{{rcb|Seoul Metropolitan Subway|Gyeongjung|inline=yes}}
cd\c!~HUBaq+c\vBHF\uBHF!~HUBq\BHF cyan!~HUBeq~~53.9~~[[Yongsan station|Yongsan]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}} {{nowrap|[[File:KTX logo.svg|100x12px|link=KTX]]}}
\vSTR\umABZg+l\STR+r!~STR cyan~~ ~~ ~~Yongsan Triangular line
exKDSTaq\exvSTRr-!~vSTR\uSTR\CONTf cyan~~ ~~ ~~Yongsan Rail Yard (closed)
WASSERq\vWBRÜCKE1\uhKRZWae\WASSERq~~[[Han River (Korea)|Han River]]
vSTR\uBHF~~56.5~~[[Noryangjin station|Noryangjin]] {{rint|seoul|9}}
mvSTRl-SHI1ro\umvSHI1+lo-STR+r
uvSHI1+l-STR+l\umvSTRr-SHI1r
uvBHF\STR~~58.0~~[[Daebang station|Daebang]] {{rint|seoul|sil}}
uvBHF\STR~~58.8~~[[Singil station|Singil]] {{rint|seoul|5}}
uvBHF-L\BHF-R~~59.8~~[[Yeongdeungpo station|Yeongdeungpo]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}} {{nowrap|[[File:KTX logo.svg|100x12px|link=KTX]]}}
uvBHF\STR~~61.3~~[[Sindorim station|Sindorim]] {{rint|seoul|2}}
uv-STR+l\uvABZgr-STR\STR\
uv-BHF-L\uvBHF-R\STR\~~62.4~~[[Guro station|Guro]]
uv-STRl\uvKRZu\umvSTR+r-SHI1+r!~uSTRq\uvSTR+r-
uCONTgq\uvSTRr-SHI1r!~uSTRq\uvSTR+r-!~umvSTR\uvSTR-~~←[[Gyeongin Line|Gyeongin]] (to [[Incheon station|Incheon]])
\uKBSTe\umvSTR\uvSTR-~~Guro Rail Yard
\uv-STR+l\uvSTRr-!~v-SHI2r\uvSTR-
\uv-STR\mvSTR-STR+l\uvSTRr-
\uv-STR!~v-NULg\mvSTR!~v-NULf\~~ ~~ ~~Northbound/Southbound
\uv-HST\mvSTR!~uv-HST\~~64.8~~[[Gasan Digital Complex station|Gasan Digital Complex]] {{rint|seoul|7}}
\uv-HST\mvSTR!~uv-HST\~~66.8~~[[Doksan station|Doksan]]
KDSTCCa\uv-BHF-L\mvSTR!~ulvBHF-R\~~68.0~~[[Geumcheon-gu Office station|Geumcheon-gu Office]]
tABZg+l\tSTRe@fq!~uv-STR\mvSTRr-STR!~vSTR-\~~ ~~ ~~←[[Gyeongbu high-speed railway]] (Siheung connecting line)
tBHFea\uv-STR\mvSTR\~~(72.7)~~[[Gwangmyeong station|Gwangmyeong]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}} {{nowrap|[[File:KTX logo.svg|100x12px|link=KTX]]}}
tCONTf\uv-HST\mvSTR!~uv-HST\~~70.3~~[[Seoksu station|Seoksu]]
\uv-HST\mvSTR!~uv-HST\~~72.2~~[[Gwanak station|Gwanak]]
\uv-BHF-L\vBHF-R!~uv-BHF\~~74.6~~[[Anyang station|Anyang]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\uv-HST\mvSTR!~uv-HST\~~76.8~~[[Myeonghak station|Myeonghak]]
\utvSTR+l-!~uv-STR\utSTRq!~mvSTR\utSTRq!~utvSTR+l-~~{{rint|seoul|4}}→
\uv-STR!~utvSTRe-\mvSTR\utvSTRe-
\uvBHF\mvSTR!~uv-BHF-L\uvBHF-R-~~78.2~~[[Geumjeong station|Geumjeong]]
uCONTgq\uv-STR!~MSTRq!~uvSTRr-!~uhSTRaq\mvSTR!~MSTRq!~uhSTRe@fq\uvSTRr-~~←{{rint|seoul|4}}
\uv-BHF-L\mvSTR!~ulvBHF-R\~~80.4~~[[Gunpo station|Gunpo]]
\uv-HST\mvSTR!~uv-HST\~~81.6~~[[Dangjeong station|Dangjeong]]
\uv-BHF-L\mvSTR!~ulvBHF-R\~~84.6~~[[Uiwang station|Uiwang]]
\uv-BHF-L\mvSTR!~ulvBHF-R\~~87.5~~[[Sungkyunkwan University station|Sungkyunkwan Univ.]]
\uv-HST\mvSTR!~uv-HST\~~90.1~~[[Hwaseo station|Hwaseo]]
\uv-BHF-L\vBHF-R!~uv-HST\~~92.2~~[[Suwon station|Suwon]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}} {{nowrap|[[File:KTX logo.svg|100x12px|link=KTX]]}} {{rcb|Seoul Metropolitan Subway|Suin–Bundang|inline=yes}}
\uv-HST\mvSTR!~uv-HST\~~95.1~~[[Seryu station|Seryu]]
\uv-SHI2gr\mvSTR!~uv-SHI2gl\uvSHI2+r-
\uvBHF\mvSTR!~uv-BHF-L\uvBHF-R-~~99.4~~[[Byeongjeom station|Byeongjeom]]
\uvSTRl-STRo\mvKRZo!~uv-STR\uSTR+r!~uSHI1+r
\uv-STR!~v-NULg\mvSTR!~v-NULf\uDST~~ ~~ ~~Byeongjeom Rail Yard
\uv-STR\mvSTR\uKBHFe~~(101.6)~~[[Seodongtan station|Seodongtan]]
\uv-HST\mvSTR!~uv-HST\~~101.8~~[[Sema station|Sema]]
\uv-HST\mvSTR!~uv-HST\~~104.5~~[[Osan University station|Osan Univ.]]
\uv-BHF-L\vBHF-R!~uv-HST\~~107.2~~[[Osan station|Osan]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\uv-HST\mvSTR!~uv-HST\~~111.2~~[[Jinwi station|Jinwi]]
\uv-HST\mvSTR!~uv-HST\~~115.0~~[[Songtan station|Songtan]]
\uv-BHF-L\vBHF-R!~uv-HST\~~117.2~~[[Seojeongni station|Seojeongni]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\uv-HST\mvSTR!~uv-HST\~~122.0~~[[PyeongtaekJije station|PyeongtaekJije]]
\uv-BHF-L\vBHF-R!~uv-HST\~~125.7~~[[Pyeongtaek station|Pyeongtaek]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\uv-BHF-L\vBHF-R!~uv-HST\~~135.1~~[[Seonghwan station|Seonghwan]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\uv-HST\mvSTR!~uv-HST\~~140.5~~[[Jiksan station|Jiksan]]
\uv-BHF-L\mvSTR!~ulvBHF-R\~~144.3~~[[Dujeong station|Dujeong]]
\uSHI1+l!~uSTR+l\mvSHI1l-STRro\
\KRW+l!~uSTR\KRWgr\
\uBHF-L\BHF-R\~~147.3~~[[Cheonan station|Cheonan]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\uBS2l\STRl!~uBS2c3\CONTfq~~[[Gyeongbu Line]] (to [[Daejeon station|Daejeon]]→
\uHST\~~148.8~~[[Bongmyeong station|Bongmyeong]]
\uHST\~~150.3~~[[Ssangyong station|Ssangyong]]
CONTgq\uBHF!~HSTq!~lhBHFaeq\CONTfq~~151.8~~[[Asan station|Asan]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}} {{nowrap|[[File:KTX logo.svg|100x12px|link=KTX]]}}
\uSTR\~~←[[Gyeongbu high-speed railway]]→
\ueHST\~~[[Tangjeong station|Tangjeong]]
\uHST\~~156.7~~[[Baebang station|Baebang]]
\uHST\~~161.6~~[[Onyangoncheon station|Onyangoncheon]] {{nowrap|[[File:Korail logo.svg|100x12px|link=Korail]]}}
\STR!~uKBHFe\~~166.7~~[[Sinchang station|Sinchang]]
\CONTf\~~[[Janghang Line]] (to [[Iksan station]])
}}
| map_state                       = collapsed
}}

[[File:Korail Class 311000 2019 July 27.webm|thumb|Seoul Subway Line 1 from above, 2019]]

'''Seoul Subway Line 1''' (dubbed ''The Dark Blue Line'') of the [[Seoul Metropolitan Subway]] is a [[rapid transit]] and [[commuter rail]] line which links central [[Seoul]], [[South Korea]] to [[Yeoncheon station|Yeoncheon]] in the northeast, [[Incheon]] in the southwest, and [[Sinchang station|Sinchang]] via [[Suwon]] and [[Cheonan]] in the south. The central underground portion of Line 1, running underneath [[Sejongno]], [[Jongno]], and [[Wangsan-ro]] avenues along Seoul's traditional downtown area, is the oldest subway-operated section in the Seoul Metropolitan Subway system. Its branches and services cover a large part of the [[Seoul Metropolitan Area]]; totaling {{cvt|218.3|km|mi}} in route length.

The underground section between [[Seoul station]] and [[Cheongnyangni station]], which is referred to as '''Seoul Metro Line 1''' ({{convert|7.8|km|mi|sp=us|abbr=on|disp=sqbr}}) after its operator, is currently operated by [[Seoul Metro]], and is [[Railway electrification|electrified]] at the subway standard of 1.5 kV DC.<ref name="Seoul-Subway-stats">{{cite web |url=http://infra.seoul.go.kr/archives/1092 |script-title=ko:지하철건설현황 |publisher=Seoul City Government |language=ko |trans-title=Status of Subway Construction |access-date=22 February 2014}}</ref> The line first opened in 1974 as the '''Korean National Railroad of Seoul''' with [[Through train|through services]] to newly-electrified (at the mainline [[Korea National Railway|KNR]] standard of 25 kV AC 60 Hz) national mainline railways from Seongbuk station (now: [[Kwangwoon University station]]) to [[Incheon station|Incheon]] and [[Suwon station]]s.<ref>{{cite web|url=https://www.koreatimes.co.kr/www/news/nation/2011/02/117_81284.html|title=Seoul's first subway line opened in 1974|publisher=Korea Times|access-date=25 July 2014|date=13 February 2011}}</ref> This was the first electrified rapid transit line and service in South Korea and the second in the Korean Peninsula after the [[Pyongyang Metro]] in [[North Korea]] opened the year before.

Frequent service is provided between Soyosan, Dongducheon, Uijeongbu, Cheongnyangni, Seoul, Yongsan, and Guro, where trains split between Incheon in the west and Byeongjeom and Cheonan in the south. Express trains operate from Yongsan and Seoul stations to [[Dongincheon station|Dongincheon]] and [[Sinchang station|Sinchang]] stations. Trains run every 3-6 min in the central route between Seoul Station and Cheongnyangni, every 6-9 min between Seoul and Guro, every 8-10 min between Guro and Incheon and between Guro and Byeongjeom, every 10-15 min from Byeongjeom to Cheonan, and every 35 min between Cheonan and Sinchang and service up to the Dongducheon area and Soyosan station.

Service to Yeoncheon is approximately once per hour, limited due to the single track section approaching Soyosan station. This service is meant to be the replacement for the Gyeongwon line commuter trains, which began at Dongducheon station prior to its closure. 

Trains travel along [[Gyeongbu Line|Gyeongbu]] (Seoul-Cheonan), [[Gyeongin Line|Gyeongin]] (Guro-Incheon), [[Janghang Line|Janghang]] (Cheonan-Sinchang), and [[Gyeongwon Line|Gyeongwon]] (Hoegi-Yeoncheon) railway lines. The line runs on the [[Left hand drive|left-hand]] side of the track, as opposed to the [[Right hand drive|right-hand]] side of the track like all other Seoul Metropolitan Subway lines (another exception to this is [[Seoul Subway Line 4]] although it runs on the [[Right hand drive|right-hand]] side until [[Namtaeryeong station]], and operates on the [[Left hand drive|left-hand]] side for the parts afterwards)<ref>{{in lang|ko}} [http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=110&oid=021&aid=0000149835 <오후여담>좌측통행], Munhwailbo</ref> since railways in Korea generally run on the left side.