List of longest subway tunnel sections

This page presents a list of the longest continuous underground rapid transit tunnel sections of the world, excluding branches from the longest tunnel (branch lines that used to transport passengers should be included).

Note: This article only lists tunnels that are 15 km (9.32 miles) or longer.

World's longest subway tunnel sections in use

Name System Country Stations Length in km (mi) Year of
completion
Lines 3-11 Suzhou Metro China Line 3 and Line 11 are connected at Weiting Station with through trains passing by. 86.54 km (53.77 mi) 2019–2023
M11 Istanbul Metro Turkey Gayrettepe – Halkalı 69 km (43 mi) 2023–2025
Line 6 Chengdu Metro China Wangcong Temple – Lanjiagou 68.2 km (42.4 mi) [1] 2020
Line 3 Guangzhou Metro Haibang – Airport North 68.2 km (42.4 mi) 2005–2024
Line 19 Chengdu Metro Huangshi to Tianfu 67 km (42 mi) 2020–2023
Line 7 Wuhan Metro Tenglong Boulevard – Qinglongshan Ditiexiaozhen 63.14 (39.23) 2018–2024
Line 1 Qingdao Metro Dongguozhuang to Wangjiagang 59.82 km (37.17 mi) 2020–2021
Line 18 Guangzhou Metro Xiancun[2] to Wanqingsha 58.3 (36.2)[2] 2021
Bolshaya Koltsevaya line Moscow Metro Russia Circle route 57.54 km (35.75 mi)[3][4]
(excluding Moscow-City branch) 		2018–2023[5]
Line 10 Beijing Subway China Circle route 57.1 (35.5) 2008–2013
Line 5 Hangzhou Metro East Nanhu - Guniangqiao 56.0 (34.93) 2019-2025
Line 7 Guangzhou Metro Meidi Dadao – Yanshan 54.24 (33.7) 2016–2023
Line 6 Beijing Subway Jin'anqiao–Lucheng 53.4 (33.2) 2012-2018
Line 2 Wuhan Metro Julong Boulevard – Fozuling 52.9 (32.9) 2012–2019
Line 8 Zhengzhou Metro Tianjianhu – Lumiao 51.8 (32.2) 2024
Seoul Subway Line 5
(longest branch) 		Seoul Subway South Korea Banghwa–Hanam Geomdansan 51.7 km (32.1 mi) 1995–2021
Line 2 Wuhan Metro China Julong Boulevard - Fozuling 50.347 (27.556) 2012–2019
Line 8 Xi'an Metro Shanmenkou – Shengtiyuguan 49.9 km (31.0 mi) 2024
Line 16 Beijing Subway Bei'anhe – Wanpingcheng 48.9 (30.4) 2016–2023
Sokolnicheskaya line Moscow Metro Russia Potapovo – Bulvar Rokossovskogo 47 (29) 1935–2024
Arbatsko-Pokrovskaya line Moscow Metro Pyatnitskoye Shosse – Shchyolkovskaya 45.1 (28.0) 1938–2012
Lyublinsko-Dmitrovskaya line Moscow Metro Zyablikovo – Fiztekh 44.3 (27.5) 1995–2023
Line 11 Guangzhou Metro China Longtan – Chisha 43.2 km (26.8 mi) 2024
Zhengxu line Zhengzhou Metro Chang'an Lu Bei – Baqian 42.9 (26.7) 2023
Zamoskvoretskaya line Moscow Metro Russia Khovrino – Alma-Atinskaya 42.8 (26.6) 1938–2018
Line 8 Beijing Subway China Yuzhi Lu – Wufutang 42.6 (26.4) 2012–2021
Line 6 Wuhan Metro Xincheng 11th Road – Dongfeng Motor Corporation 42.5 km (26.4 mi) 2016–2021
Line 15 Shanghai Metro Gucun Park – Zizhu Hi-tech Park 42.3 (26.3) 2021
Line 5 Chengdu Metro Jiudaoyan – Huilong 42.3 (26.3) 2019
Tagansko-Krasnopresnenskaya line Moscow Metro Russia Planernaya – Kotelniki 42.2 (26.2) 1966–2015
Line 1 Xi'an Metro China Xianyangxizhan – Fangzhicheng 42.2 (26.2) 2013–2023
Line 14 Beijing Subway Dawayao – Shangezhuang 42 (26) 2015–2021
Line 6 Tianjin Metro Nanhezhuang – Lushuidao 42 (26) 2016–2021
Downtown MRT line Mass Rapid Transit (Singapore) Singapore Bukit Panjang – Expo 41.9 (26)[6] 2013–2017
Line 2 Xiamen Metro China Tianzhushan – Wuyuanwan 41.6 (25.9) 2019
Line 3 Nanjing Metro Xinghuolu – Mozhoudonglu 41.5 (25.8) 2015
Line 4 Suzhou Metro Longdaobang — Tongli 41.5 (25.8) 2017
Serpukhovsko-Timiryazevskaya line Moscow Metro Russia Altufyevo – Bulvar Dmitriya Donskogo 41.2 (25.6) 1983–2002
Line 1 Zhengzhou Metro China Henan University of Technology – New Campus of Henan University 41.2 km (25.60 mi) 2013–2019
L-12 (Metro Sur) Madrid Metro Spain Circle route 40.96 (25.5) 2003
Toei Oedo Line Toei Subway Japan Hikarigaoka – Tocho-mae 40.7 (25.3)[7] 1991–2000
Seoul Subway Line 9 Seoul Subway South Korea Gimpo Airport – VHS Medical Center 40.6 (25.2) 2018
Line 6 Zhengzhou Metro China Donglinsi – Qinghua Fuzhong 40.5 (25.2) 2022-2024
Line 12 Shanghai Metro Qixin Road – Jinhai Road 40.4 (25.1) 2015
Line 5 Zhengzhou Metro Circle route 40.4 (25.1) 2019
Line 7 Beijing Subway Beijing West railway station - Universal Resort 40.3 (25.0) 2021
Line 6 Xi'an Metro Xi'annanzhan – Fangzhicheng 39.6 (24.6) 2020–2024
Line 11 Wuhan Metro Jiang'an Road – Gediannan Railway Station 39.4 km (24.5 mi) 2018–2024
Line 4 Chengdu Metro Wansheng – Chengdu University 39.3 (24.4) 2015–2017
Line 7 Chengdu Metro Circle route 38.6 (24.0) 2017
Line 8 Wuhan Metro Jintan Road – Military Athletes' Village 38.2 km (23.7 mi) 2017–2021
Kaluzhsko-Rizhskaya line Moscow Metro Russia Medvedkovo – Novoyasenevskaya 37.8 (23.5) 1958–1990
Line 12 Guangzhou Metro China Xunfenggang – Higher Education Mega Center South 37.6 (23.36) 2025
Line 1 Chengdu Metro Weijianian – Science City 37.47 (23.3) 2010–2018
Line 2 Shenzhen Metro Chiwan – Xinxiu 35.78 (22.23) 2011
Busan Subway Line 2 Busan Transportation Corporation South Korea Jangsan–Dongwon 35.5 (22.06) 1999
Metro North West & Bankstown Line Sydney Metro Australia Cherrybrook – Sydenham 35.5 km (22.1 mi) 2009–2024[8]
Line 4 Xi'an Metro China Xi'an Beizhan – Hangtianxincheng 35.2 (21.9) 2018
Seoul Subway Line 6 Seoul Subway South Korea Eungam Loop – Bonghwasan 35.1 (21.8) 2001
Seoul Subway Line 7
(longest branch) 		Seoul Subway Cheongdam – Bupyeong-gu Office 35.1 (21.7) 2012
Line 5 Tianjin Metro China Beichenkejiyuanbei – Liqizhuangnan 34.8 (21.6) 2018–2021
Line 7 Shanghai Metro Panguang Road – Huamu Road 34.4 (21.38) 2010
Line 8 Guangzhou Metro Wanshengwei—Jiaoxin 33.9 (21.1) 2010–2020
Line 1 Ürümqi Metro Santunbei – International Airport 33.7 km (20.9 mi) 2019
Line 2 Xi'an Metro Caotan –Changninggong 33.6 (20.9) 2011–2023
M4 Istanbul Metro Turkey Kadıköy – Sabiha Gökçen Havalimanı 33.5 (20.8) 2012–2022
Circle MRT line Mass Rapid Transit (Singapore) Singapore Dhoby Ghaut – HarbourFront 33.3 (20.69)[9] 2009–2012
Line 3 Wuhan Metro China Zhuanyang Boulevard – Hongtu Boulevard 33.2 km (20.63 mi) 2015
L-7 Madrid Metro Spain Hospital del Henares – Pitis 32.9 (20.5) 2007
U7 Berlin U-Bahn Germany Rathaus Spandau-Rudow 31.8 (19.7)[10] 1924–1984
Line 3 Zhengzhou Metro China Henan Sports Center - Binhe Xincheng Nan 31.8 (19.7) 2020-2023
Line 3 Mumbai Metro India SEEPZ – Cuffe Parade 31.2 km (19.4 mi)[11] 2024–2025
Bucharest Metro Line M1 Bucharest Metro Romania Pantelimon – Dristor 2 31.01 km (19.3 mi) 1979–1991
Line 1 Beijing Subway China Pingguoyuan – Dawang Lu 31.0 (19.3) 1971–2000
Line 2 Zhengzhou Metro China Jiahe – Nansihuan 30.9 km (19.2) 2016–2019
Solntsevskaya line Moscow Metro Russia Aeroport Vnukovo – Delovoy Tsentr 30.9 (19.2) 2014–2023
IND Eighth Avenue Line and IND Fulton Street Line[12] New York City Subway United States Inwood – 207th Street – Grant Avenue 30.8 (19.14) 1956
Line 2 Orange Montreal Metro Canada Côte-Vertu – Montmorency 30.8 (19.14) 2007
Thomson–East Coast line Mass Rapid Transit (Singapore) Singapore Woodlands North – Gardens by the Bay 30.4 km (18.9 mi) 2020–2022
Line 2 Shanghai Metro China East Xujing – Longyang Road 30.2 (18.77) 2010
Moskovsko-Petrogradskaya Line Saint Petersburg Metro Russia Parnas–Kupchino 30.1 (18.7) 1961–2006
Line 8 Shanghai Metro China Shiguang Road – Luheng Road 29.7 (18.45) 2009
Kirovsko-Vyborgskaya Line Saint Petersburg Metro Russia Devyatkino – Prospekt Veteranov 29.57 (18.4) 1955–1978
Line 4 Zhengzhou Metro China Laoyachen - Langzhuang 29.29 (18.2) 2020
Line 4 Wuhan Metro Yong'antang – Wuhan Railway Station 29.2 (18.1) 2013–2019
Line 8 Chengdu Metro (Phase 2 is 7.94 km) 29.1 (18.1) 2020
Line 13 Chengdu Metro Qiligou – Longhua Temple 29.07 km (18.06 mi) 2025
Line 2 Chengdu Metro Tianhe Road – Chengdu Institute of Public Administration 29.0 (18.0) 2012–2013
Line 3 Wuxi Metro Sumiao – Sunan Shuofang International Airport 28.8 (17.9) 2020
Bannan Line (Taipei Metro Blue Line) Taipei Metro Taiwan Dingpu – Taipei Nangang Exhibition Center 28.2 (17.6)
 1999–2015
Line 4 Beijing Subway China Anheqiao Bei (N) – Gongyi Xiqiao 28.2 (17.5) 2009–2010
Incheon Subway Line 1 Incheon Subway South Korea Bakchon – International Business District 27.9 (17.42) 1999–2009
Line 5 Wuhan Metro China East Square of Wuhan Railway Station – Fenghuocun 27.9 (17.42) 2021–2023
Line 14 Paris Métro France Saint-Denis–Pleyel – Aéroport d'Orly 27.8 (17.3) 1998–2024
Northern line London Underground United Kingdom Morden – East Finchley 27.8 (17.2) 1890–1940
Nevsko-Vasileostrovskaya Line Saint Petersburg Metro Russia Begovaya–Rybatskoye 27.7 (17.2) 1967–2018
Tanimachi Line Osaka Metro Japan Dainichi–Nagahara 27.1 (16.7) 1967–1983
Line 1 Milan Metro Italy The whole line is underground 27 km

(17 mi)

1964–2005
Line 7 Zhengzhou Metro China Dongzhao – Nangangliu 26.8 (16.7) 2024
M3 Istanbul Metro Turkey Bakırköy Sahil – Şehir Hastanesi Viaduct 26.7 (16.6) 2013–2025
M5 Istanbul Metro Turkey Üsküdar – Samandıra Merkez 26.5 (12.5) 2017–2024
Meijo Line Nagoya Municipal Subway Japan Circle route 26.4 (16.4) 1965–2004
B Line Los Angeles Metro Rail United States North Hollywood - Union Station 26.4 (16.4) 1993–2000
Line 30 Chengdu Metro China (Phase 1 is 26.28 km) 26.28 km (16.33 mi) 2025
Frunzensko-Primorskaya Line Saint Petersburg Metro Russia Komendantsky Prospekt – Shushary 26.2 (16.3) 1997–2019
Line 1 Suzhou Metro China Mudu – Zhongnan Jie 25.7 (16.0) 2012
Line 4 Wuxi Metro Liutan – Wuxi Taihu International Expo Center 25.4 km (15.8 mi) 2021
Line 3[13] Athens Metro Greece Dimotiko Theatro – Doukissis Plakentias 25.3 (15.72) 2023
Line 9 Xi'an Metro China Fangzhicheng – Qinlingxi 25.2

(15.7)

2020
Helsinki Metro Helsinki Metro Finland Kalasatama – Kivenlahti 25.2 (15.7) 1982–2022
Orange Line Taipei Metro Taiwan Huilong–Nanshijiao 25.1 (15.6)
(longest branch) 		1998–2013
Line 3 Santiago Metro Chile Plaza de Quilicura - Fernando Castillo Velasco 25 (13.5) 2019–2023
Line 3 Xi'an Metro China Yuhuazhai –Guangtaimen 24.8 (15.4) 2016
Line 3 Xuzhou Metro Zhenxingdadao – Gaoxinqu'nan 24.7 (15.3)[14] 2021–2024
Yurakucho Line Tokyo Metro Japan Chikatetsu Narimasu – Tatsumi 24.6 (15.3) 1974–1988
U2 Munich U-Bahn Germany Feldmoching – Messestadt Ost 24.4 (15.2) 1980–2001
Line 2 Xuzhou Metro China Keyunbei – Xinchengqudong 24.4 (15.1) 2020
Yellow Line Delhi Metro India GTB Nagar – Saket 24 (14.9)[15][16] 2009–2010
L-1 Madrid Metro Spain Valdecarros – Pinar de Chamartín 23.88 (14.84) 1919–2007
L-6 Madrid Metro Circle route 23.47 (14.58) 1979–2007
Line 9 Shanghai Metro China Jiuting – Middle Yanggao Road 23.3 (14.48) 2007–2010
Line 1 Green Montreal Metro Canada Angrignon – Honoré-Beaugrand 23.26 (14.45) 1966–1978
Warsaw Metro M1 Warsaw Metro Poland Kabaty–Młociny 23.1 (14.35) 1995–2008
Line 2 Beijing Subway China Circle route 23.1 (14.35) 1984–1987
IND Eighth Avenue Line New York City Subway United States 207th Street station – High Street 23 (14 mi) 1932–1933
Line 6 Xuzhou Metro China Xuzhou Tongshan District Hospital of TCM – Xuzhoudong Railway Station 22.9 (14.2) 2025
Line 19 Wuhan Metro West Square of Wuhan Railway Station – Xinyuexi Park 22.7km (14.1mi) 2023
Bucharest Metro Line M3 Bucharest Metro Romania Preciziei – Anghel Saligny 22.20 km (13.79 mi) 1983–2008
Line 9 Chengdu Metro China Phase 1 of the second loop line in Chengdu, all underground 22.18 km (13.78 mi) 2020
Line 19 Beijing Subway Mudanyuan – Xingong 20.9 (13) 2021
Line 10 Zhengzhou Metro China Zhengzhou Railway Station – Zhengzhouxi Railway Station 21.9 (13.6) 2023
Namboku Line Tokyo Metro Japan Meguro – Akabane-Iwabuchi 21.3 (13.2) 1991–2000
Songshan-Xindian Line (Taipei Metro Green Line) Taipei Metro Taiwan Songshan-Xindian 21.3 (13.2) 1998–2014
Line 4 Shanghai Metro China Hailun Road – Yishan Road 21.1 (13.11) 2005–2007
Toei Mita Line Toei Subway Japan Meguro – Shimura-Sakaue 21.1 (13.11) 1968–2000
Victoria line London Underground United Kingdom Walthamstow Central – Brixton 21.0 (13.05) 1968–1971
Obolonsko–Teremkivska line Kyiv Metro Ukraine Heroiv Dnipra–Teremky 20.95 (13.02) 1976–2013
Line 6 Shanghai Metro China Boxing Road – Oriental Sports Center 20.34 (12.64) 2007–2011
Line 1 Barcelona Metro Spain Fondo – Hospital de Bellvitge 20.2 (12.56) 1926–1989
Tozai Line Sapporo Municipal Subway Japan Miyanosawa – Shin-Sapporo 20.1 (12.4)[17] 1976–1999
M1 Ankara Metro Turkey Koru – Atatürk Kültür Merkezi 20.1 (12.4) 1997–2014
Red Line Baku Metro Azerbaijan Icheri Sheher – Hazi Aslanov 20.1 (12.4) 1967–2002
L-5 Madrid Metro Spain Alameda de Osuna – Empalme 20.005 (12.5) 1968–2006
Line 9 Barcelona Metro Zona Universitaria – Aeroport T1 20.0 (12.5) 2004–2016
North East MRT line Mass Rapid Transit (Singapore) Singapore HarbourFront–Punggol 20.0 (12.43)[18] 2003–2011
Line 7
(longest branch) 		Paris Métro France La Courneuve–8 mai 1945 – Villejuif–Louis Aragon 19.8 (12.3) 1910-1987
Line 2 Tianjin Metro China Caozhuang – Guoshanlu 19.7 (12.2) 2012–2014
Nekrasovskaya line Moscow Metro Russia Nizhegorodskaya – Nekrasovka 19.6 (12.2) 2019–2020
Line 9 Paris Métro France Pont de Sèvres – Mairie de Montreuil 19.6 (12.2) 1922–1937
M2 Istanbul Metro Turkey Şişhane – Hacıosman
Line is 23,49 km long, but the longest continuous underground section is 19.54 km long. 		19.54 (12.14) 2000–2014
Red, Yellow, Blue, and Green Lines Bay Area Rapid Transit, San Francisco United States Balboa Park – West Oakland 19.5 (12.12) 1973
Line 5 Xi'an Metro China Huanlegu – Yuedengge 19.5 (12.12)[19] 2020–2024
Kol'tsevaya Line Moscow Metro Russia Circle route 19.4 (12.2) 1950–1954
U3 Munich U-Bahn Germany Moosach – Fürstenried West 19.4 (12.05) 1972–2009
Line 4 Tianjin Metro China Dongnanjiao – Xinxingcun 19.4 (12) 2021
Line 3 Tianjin Metro Huayuan – Tianshili 19.2 (11.9) 2012–2013
Midosuji Line Osaka Metro Japan Nakatsu – Nakamozu 19.1 (11.87) 1933–1987
Maskoŭskaja line Minsk Metro Belarus Malinawka–Uruchcha 19.1 (11.9) 1984–2014
Sakuradori Line Nagoya Municipal Subway Japan Taiko-dori – Tokushige 19.1 (11.87) 1989–2011
Line 5 Barcelona Metro Spain Vall d'Hebron – Cornella centre 19.0 (11.8) 1955–2010
Tsurumai Line Nagoya Municipal Subway Japan Shōnai Ryokuchi Kōen – Akaike 19.0 (11.8) 1977–1993
Warsaw Metro M2 Warsaw Metro Poland Bemowo–Bródno 18.9 km (11.7 mi) 2015–2022
Mexico City Metro Line 3 Mexico City Metro Mexico La Raza – Universidad 18.7 (11.62) 1970–1983
Bucharest Metro Line M2 Bucharest Metro Romania Pipera – Berceni 18.7 (11.6 mi) 1986 - 1987
Line 7
(shorter branch) 		Paris Métro France La Courneuve–8 mai 1945 – Mairie d'Ivry 18.5 (11.5) 1910-1987
Line A Rome Metro Italy Battistini – Anagnina 18.43 (11.45 mi) 1989–2000
Line 3 Barcelona Metro Spain Zona Universitària – Trinitat Nova 18.4 (11.44) 1925–2008
Toei Asakusa Line Toei Subway Japan Nishi-magome – Oshiage 18.4 (11.44) 1960
Chiyoda line Tokyo Metro Yoyogi-koen – Kita-Senju 18.3 (11.37) 1969
U8 Berlin U-Bahn Germany Wittenau – Hermannstraße 18.1 (11.25) 1927–1996
Blue Line Yokohama Municipal Subway Japan Konan-Chuo – Kita Shin-Yokohama 18.1 (11.25) 1972–1999
Avtozavodskaya Line Minsk Metro Belarus Kamennaya Gorka – Mogilevskaya 18.1 (11.25) 1990–2005
Line 1 Shanghai Metro China Shanghai South Railway – Shanghai Circus World 18.1 (11.25) 1993–2004
Line B Prague Metro Czechia Rajská zahrada – Hůrka 18.0 (11.2) 1998
Line 16 Wuhan Metro China South International Expo Center – Dajunshan 17.8 (11.1) 2021–2022
Line 2[13] Athens Metro Greece Anthoupoli – Elliniko 17.9 (11.12) 2013
Line 5 Beijing Subway China Huixin Xijie Beikou – Songjiazhuang 17.8 (11.1) 2007
Washington, DC Metro Red Line Washington Metro United States Union Station – Medical Center 17.8 (11.05) 1984
Line 15 Beijing Subway China Qinghua Donglu Xikou – Maquanying 17.6 (10.9) 2014
Higashiyama Line Nagoya Municipal Subway Japan Takabata – Issha 17.5 (10.92) 1957–1982
Tozai Line Kyoto Municipal Subway Uzumasa Tenjingawa-Yamashina-Rokujizō 17.5 (10.92) 1997–2008
Line 27 Chengdu Metro China Shuxin Road - Fanjia Alley 17.34 km (10.77 mi) 2024
Line 4 Barcelona Metro Spain Trinitat Nova – La Pau 17.3 (10.76) 1908–1999
Kholodnohirsko–Zavodska line Kharkiv Metro Ukraine Kholodna Hora – Industrialna 17.3 (10.7) 1975–1978
Line 12 Paris Métro France Mairie d'Aubervilliers – Mairie d'Issy 17.2 (10.7) 1910–2022
Line 3 Milan Metro Italy Comasina – San Donato 17.105 (10.62) 1990–2011
Tōzai Line Tokyo Metro Japan Nakano–Minami-Sunamachi 17.0 (10.56) 1964–1969
M1 İzmir Metro Turkey Narlıdere Kaymakamlık – Basmane
Line is 27 km long, but only 19.8 km of it is underground in two noncontinuous sections. The shorter underground section is 2.9 km long. 		16.9 (10.5) 2000–2024
Line 13
(longest branch) 		Paris Métro France Malakoff–Plateau de Vanves – Saint-Denis-Université 16.8 (10.5) 1911–1998
Hanzomon Line Tokyo Metro Japan Shibuya-Oshiage 16.8 (10.4) 1978–2003
Mexico City Metro Line 1 Mexico City Metro Mexico Observatorio – Pantitlán 16.7 (10.38) 1984
Blue Line Chennai Metro India Saidapet - Tondiarpet 16.6 (10.32) 2018–2021
Line 9 Beijing Subway China National Library – Guogongzhuang 16.5 (10.3) 2012
Line 1 Xiamen Metro Gaoqi – Zhenhai Road 16.5 (10.3)
Line 17 Beijing Subway Shilihe – Jiahuihu 16.5 (10.3) 2021
Line 12 Zhengzhou Metro Longzihu Dong – Lianghu 16.5 (10.3) 2023
L-3 Madrid Metro Spain Villaverde Alto – Moncloa 16.42 (10.2) 2007
Line 1 Chongqing Rail Transit China Chaotianmen – Shapingba 16.4 (10.2) 2011
Line A Prague Metro Czechia Nemocnice Motol – Depo Hostivař
Line is 17.1 km long, but only 16.4 km of it is underground. 		16.4 (10.2) 2015
Hibiya Line Tokyo Metro Japan Ebisu – Minowa 16.4 (10.2) 1961
Kalininskaya line Moscow Metro Russia Tretyakovskaya – Novokosino 16.3 (10.1) 1979–2012
Line 8 Paris Métro France Balard – Charenton–Écoles 16.2 (10.1) 1913–1942
L-4 Madrid Metro Spain Argüelles – Pinar de Chamartín 16.0 (9.9) 2007
Sviatoshynsko–Brovarska line Kyiv Metro Ukraine Akademmistechko–Dnipro 16.0 (9.9) 1960–2003
Seoul Subway Line 7
(shorter section) 		Seoul Subway South Korea Suraksan – Konkuk University 16.0 (9.9) 1996
U6 Berlin U-Bahn Germany Alt-Mariendorf – Kurt-Schumacher-Platz 15.9 (9.86) 1923–1966
M9 Istanbul Metro Turkey Ataköy – Olimpiyat Viaduct 15.8 (9.8) 2013–2024
Line B Toulouse Metro France Borderouge to Ramonville 15.7 (9.8) 2007
M3 Line Copenhagen Metro Denmark Circle route 15.5 km (9.6 mi) 2019
Line 3[20] Budapest Metro Hungary Határ út–Újpest-központ
Line is 17.39 km long, but only 15.5 km of it is underground. 		15.5 km (9.6 mi) 1990
Line 1 Tianjin Metro China Qinjiandao – Tucheng 15.37 (9.55) 2006
Line 6 Santiago Metro Chile Cerrillos – Los Leones 15.3 (9.5) 2017
Syretsko–Pecherska line Kyiv Metro Ukraine Syrets – Pivdennyi Bridge 15.2 (9.4) 1989–2004
Line 4 Milan Metro Italy San Cristoforo FS – Linate Aeroporto 15.2 km (9.4 mi) 2022–2024
Blue Line Kolkata Metro India Mahanayak Uttam Kumar – Dum Dum 15.17 (9.38) 1984–1995
Line 1 Turin Metro Italy Fermi – Bengasi 15.1 (9.4) 2006–2021
Line 16 Xi'an Metro China Qinchuangyuanzhongxin – Shijingli 15.03 (9.34) 2023
Island line MTR Hong Kong Kennedy Town[21] – Heng Fa Chuen 15.0 (9.32) 1985 (as Hong Kong)–2014
Nagahori Tsurumi-ryokuchi Line Osaka Metro Japan Taisho – Kadoma-minami 15.0 (9.32) 1990–1997
Line 10 Chengdu Metro China Taipingyuan – Shuangliu West Railway Station 15.0 (9.32) 2019

World's longest subway tunnel sections under construction

Name System Country Stations Length Expected completion
Line 15 Paris Métro France Noisy–Champs - Champigny Centre
Circle route, all underground 		75 km (47 mi) Southern section: 2025
Full line: 2031
Cross Island line Mass Rapid Transit (Singapore) Singapore Linear route with branch section, all underground
(Excludes potential extension from Punggol to Seletar Airport under planning) 		65.5 km (40.7 mi)
 2030–2032
Suburban Rail Loop Melbourne rail network Australia SRL East and North is underground (Cheltenham to Airport) 60 km (37 mi) 2035[22] (SRL East)

2043–2053 (SRL North)

Line 13 Guangzhou Metro China Whole lines is underground
(includes Phase II: Chaoyang – Zhucun is 33.6 km and under construction) 		59.2 km (36.8 mi) Phase 1：2017
Phase 2：2026
L9 / L10 Barcelona Metro Spain 47.8 km (29.7 mi)
(incl. branches) 		2009 and 2016 partially;
central section: 2028–2029
Line 13 Shenzhen Metro China Whole line is underground 45.72 km (28.41 mi) Phase 1：2024
Phase 2 (North extension)：2025
South extension：2026
Thomson–East Coast line Mass Rapid Transit (Singapore) Singapore Woodlands North to Sungei Bedok
(Phases 4 and 5, Gardens by the Bay – Sungei Bedok are 13 km in length and are currently under construction, all underground) 		43.4 km (27.0 mi) Phase 4：2024
Phase 5：2H 2026
  Green line
 Baku Metro Azerbaijan Circle route, all underground 41.8 km (26.0 mi) Loop’s Southern extension to the East: 2030
Full line: 2040
Line 22 Shanghai Metro China Jinji Road - Dongtan 40.9 km 2026
Troitskaya line Moscow Metro Russia Whole line is underground 40.2 km (25.0 mi) Phase 1：2024 (25 km (16 mi))
Phase 2：2028–2029 (15.2 km (9.4 mi))
Athens Metro Line 4 Athens Metro Greece 38.2 km (23.7 mi)[23] 2029 for Phase 1[24]
Metro Manila Subway Manila Metro Rail Transit System Philippines Mindanao Avenue – Ninoy Aquino International Airport (All underground) 36 km (22 mi) 2029
Line 22 Shenzhen Metro China Shangsha - Liguang 34.2km Phase 1: 2029
Line 6 Nanjing Metro China Whole line is underground 32.4 km 2026
Line 15 Shenzhen Metro China Whole line is underground 32.2 km (20.0 mi) 2028
Circular line Taipei Metro Taiwan Y19A – Dapinglin 29.7 km (18.5 mi) 2032
Line 16 Paris Métro France Saint-Denis–Pleyel - Noisy–Champs
All underground 		27.5 km (17.1 mi) Phase 1: 2026
Phase 2: 2028
Line 3 Chennai Metro India Madhavaram Milk Colony – Tharamani 27.086 km (16.830 mi) 2026–2027
D Line Extension Los Angeles Metro United States Westwood/VA Hospital – Union Station 24.3 km (15.1 mi) 2025–2026
Metro West Sydney Metro Australia 24 km (15 mi) 2032[25]
Metro Western Sydney Airport Sydney Metro 23 km (14 mi) 2026
Line C Toulouse Metro France Underground from Colomiers Gare to Montaudran Gare, full line will be 27 km long.[26] 22 km (14 mi) 2028
Blue Line Stockholm Metro Sweden The extension to Nacka will be around 8 km, all underground, total 22 km including older sections. 22 km (14 mi) 2030
M2 İzmir Metro Turkey Üçyol – Fuar İzmir
All underground 		17.8 km (11.1 mi) 2027
Bucharest Metro Line M6 Bucharest Metro Romania Gara de Nord – Aeroportul Otopeni 17.8 km (11.1 mi) 2028–2029

See also

References

  1. ^ "独家探访|关于西部最长地铁6号线，你想知道的一切都在这里". 9 September 2020. 成都地铁6号线全长68.76千米，共设有56座车站
  2. ^ a b "广州地铁18号线陇枕停车场首次迎接"活力橙"". 金羊网. 20 February 2021. Archived from the original on 10 April 2021. Retrieved 10 April 2021. 广州市2021年十件民生实事显示，2021年广州将力争开通试运营地铁18号线先通段（万顷沙-冼村，58.3公里）、22号线先通段（番禺广场-陈头岗，18.2公里）
  3. ^ "Не 70 км, а 57,5! Как московские власти "удлинили" Большую кольцевую линию метро". 22 March 2023.
  4. ^ "IMG 20230327 063939 969 — Postimages".
  5. ^ First stretch opens in 1969 as part of line 2
  6. ^ "Downtown Line 3 officially opens; Khaw Boon Wan announces review of fares incurred when switching between stations". The Straits Times. 20 October 2017. Retrieved 13 June 2019.
  7. ^ "東京都交通局,交通局について,都営地下鉄". 東京都交通局 (in Japanese). Retrieved 10 December 2025.
  8. ^ "Minns Labor Government will deliver Sydenham to Bankstown section of City and Southwest Metro | NSW Government". August 2023.
  9. ^ "Factsheet on Circle Line Extension". www.lta.gov.sg. 28 November 2011. Retrieved 13 June 2019.
  10. ^ "World's longest railway tunnel" 1984–1988
  11. ^ "SEEPZ to Cuffe Parade Metro Route Map, Fare & First-Last Metro Timings - Mumbai Metro". mumbaimetroroute.com. Retrieved 11 December 2025.
  12. ^ Note that both lines are served continuously by the A train within a single tunnel.
  13. ^ a b "Urban Rail Transport SA :METRO Line 1". Retrieved 30 September 2014.
  14. ^ "Xuzhou Metro Group". Railway Gazette International. Retrieved 30 December 2025.
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  18. ^ "North East Line". www.lta.gov.sg. Retrieved 13 June 2019.
  19. ^ "Xi'an Metro Line 5: Timetable, Stations, Surroundings". www.travelchinaguide.com. Retrieved 30 December 2025.
  20. ^ "3-as metróvonal jellemzői". Metros.hu (in Hungarian). Retrieved 27 March 2016.
  21. ^ Including 0.4 miles/0.65 km of overrun tunnel to the west of Kennedy Town station. - Gammon. "MTR West Island Line - Sai Ying Pun; Hong Kong University and Kennedy Town Stations - Project details". - CIHT Hong Kong Branch. "West Island Line, Contact 705, KET Station & Overrun Tunnel" (PDF).
  22. ^ "Works Start Today on Victoria's Suburban Rail Loop | Premier of Victoria".
  23. ^ "Ελληνικο Μετρο Α.ε." (PDF). Archived from the original (PDF) on 21 September 2022.
  24. ^ "Μετρό-Γραμμή 4: Ξεκινούν τα έργα - Οι 15 σταθμοί από Γαλάτσι έως Γουδί - Έτοιμο σε 8 χρόνια". www.naftemporiki.gr (in Greek). 22 June 2021. Retrieved 20 May 2022.
  25. ^ "Metro West to supercharge housing supply across Sydney | NSW Government". 7 December 2023.
  26. ^ "Tunnel du métro : du creusement à la construction" (PDF). 28 September 2024. Les cinq tunneliers de la ligne C creuseront 22 km en souterrain
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