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 (6.2 miles) or longer.

World's longest subway tunnel sections in use
Name System Country Stations Length in km (mi) Year of
completion
Line 6 Chengdu Metro  China Wangcong Temple – Lanjiagou 73 km (45 mi)[1][2][3][4] 2020
Line 3 Guangzhou Metro  China Airport North – Panyu Square 57.93 (36) 2005-2018
Line 10 Beijing Subway  China Circle route 57.1 (35.5) 2013
Line 6 Beijing Subway  China Jin'anqiao – Lucheng 53.4 (33.2) 2018
Seoul Subway Line 5 Seoul Metropolitan Rapid Transit Corporation  South Korea Banghwa–Hanam Pungsan 48.7 km (30.3 mi)
(longest branch)		 2020
Line 2 Wuhan Metro  China Jinyintan – Fozuling 44.347 (27.556) 2019
Downtown MRT Line Mass Rapid Transit (Singapore)  Singapore Bukit Panjang – Expo 44.2 (27.5)[5] 2017
Line 15 Shanghai Metro  China Gucun Park – Zizhu Hi-tech Park 42.3 (26.3) 2021
Line 5 Chengdu Metro  China Jiudaoyan – Huilong 42.3 (26.3) 2019
Line 3 Nanjing Metro  China Xinghuolu – Mozhoudonglu 41.5 (25.8) 2015
Line 4 Suzhou Rail Transit  China Longdaobang — Tongli 41.5 (25.8) 2017
Serpukhovsko-Timiryazevskaya Line Moscow Metro  Russia Altufyevo – Bulvar Dmitriya Donskogo 41.5 (25.7) 2002
Metro Madrid L-12: (Metro Sur) Madrid Metro  Spain Circle route 40.96 (25.5) 2003
Toei Oedo Line TMBT Subway  Japan Hikarigaoka – Shiodome – Tocho-mae 40.7 (25.3) 2000
Seoul Subway Line 9 Seoul Metro Line 9 Corporation  South Korea Gimpo Airport – VHS Medical Center 40.6 (25.2) 2018
Line 12 Shanghai Metro  China Qixin Road – Jinhai Road 40.4 (25.1) 2015
Line 7 Beijing Subway  China Beijing West Railway Station - Hua Zhuang 40.3 (25.0) 2019
Line 4 Chengdu Metro  China Wansheng – Chengdu University 39.3 (24.4) 2017
Line 7 Chengdu Metro  China Circle route 38.6 (24.0) 2017
Lyublinsko-Dmitrovskaya Line Moscow Metro  Russia Zyablikovo – Seligerskaya 38.3 (23.8) 2018
Line 3 Chengdu Metro  China Chengdu Junqu General Hospital – Shuangliu West Station 38.1 (23.7) 2018
Kaluzhsko-Rizhskaya Line Moscow Metro  Russia Medvedkovo – Novoyasenevskaya 37.8 (23.5) 1990
Line 1 Chengdu Metro  China Weijianian – Science City 37.47 (23.3) 2018
Line 2 Shenzhen Metro  China Chiwan – Xinxiu 35.78 (22.23) 2011
Busan Subway Line 2 Busan Transportation Corporation  South Korea Jangsan–Dongwon 35.5 (22.06) 1999
Seoul Subway Line 6 Seoul Metropolitan Rapid Transit Corporation  South Korea Eungam Loop – Bonghwasan 35.1 (21.81) 2001
Seoul Subway Line 7
(longest branch)		 Seoul Metropolitan Rapid Transit Corporation  South Korea Cheongdam – Bupyeong-gu Office 35.1 (21.7) 2012
Line 7 Shanghai Metro  China Panguang Road – Huamu Road 34.4 (21.38) 2010
Line 8 Guangzhou Metro  China Wanshengwei—Jiaoxin 33.9 2020
Circle MRT Line Mass Rapid Transit (Singapore)  Singapore Dhoby Ghaut – HarbourFront 33.3 (20.69)[6] 2011
Metro Madrid 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)[7] 1984
IND Eighth Avenue Line and IND Fulton Street Line[8] 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
Line 2 Shanghai Metro  China East Xujing – Longyang Road 30.2 (18.77) 2010
Moskovsko-Petrogradskaya Line Saint Petersburg Metro  Russia Parnas–Kupchino 29.7 (18.54) 2006
Line 8, Shanghai Metro Shanghai Metro  China Shiguang Road – Luheng Road 29.7 (18.45) 2009
Kirovsko-Vyborgskaya Line Saint Petersburg Metro  Russia Devyatkino – Prospekt Veteranov 29.4 (18.35) 1978
Line 2 Chengdu Metro  China Tianhe Road – Chengdu Institute of Public Administration 29.0 (18.0) 2012–2013
Sydney Metro Northwest Sydney Metro  Australia Kellyville – Chatswood section 28.5 km (17.71 mi) 2009–2019
Bannan Line (Taipei Metro Blue Line) Taipei Metro  Taiwan Dingpu – Taipei Nangang Exhibition Center 28.2 (17.6)
 1999–2015
Incheon Subway Line 1 Incheon Subway  South Korea Bakchon – International Business District 27.9 (17.42) 1999–2009
Northern line London Underground  United Kingdom Morden – East Finchley 27.8 (17.2) 1890–1940
Line 3 Saint Petersburg Metro  Russia Begovaya–Rybatskoye 27.5 (17.1) 1967–2018
Tanimachi Line Osaka Metro  Japan Dainichi–Nagahara 27.1 (16.7) 1967–1983
M4 (Istanbul Metro) Istanbul Metro  Turkey Kadıköy–Tavşantepe 26.5 (16.4) 2012–2016
Meijo Line Nagoya Municipal Subway  Japan Kanayama–Nagoya Dome-mae Yada-Kanayama 26.4 (16.4) 1965–2004
B Line (Red) Los Angeles Metro  United States North Hollywood - Union Station 26.4 (16.4) 1993–2000
Line 5 (Saint Petersburg Metro) Saint Petersburg Metro  Russia Komendantsky Prospekt – Shushary 26.0 (16.2) 1997–2019
Line 1 Suzhou Metro  China Mudu – Zhongnan Jie 25.7 (16.0) 2012
Zhonghe-Xinlu Line (Taipei Metro Orange Line) Taipei Metro  Taiwan Huilong–Nanshijiao 25.1 (15.6)
(longest branch)		 1998–2013
Yurakucho Line Tokyo Metro  Japan Chikatetsu Narimasu – Tatsumi 24.6 (15.3) 1974–1988
Munich U-Bahn U2 Munich U-Bahn  Germany Feldmoching – Messestadt Ost 24.4 (15.2) 1980–2001
Yellow Line Delhi Metro  India GTB Nagar – Qutub Minar 24 (14.9)[9][10] 2010
L-1 Madrid Metro  Spain Valdecarros – Pinar de Chamartín 23.88 (14.84) 1919–2007
L-6 Madrid Metro  Spain 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 L-1 Warsaw Metro  Poland Kabaty–Młociny 23.1 (14.35) 1995–2008
Line 2 Beijing Subway  China Circle route 23.1 (14.35) 1984–1987
Line 9 Chengdu Metro  China Phase 1 of the second loop line in Chengdu, all underground 22.18 km (13.78 mi) 2020
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
Line 6, Shanghai Metro Shanghai Metro  China Boxing Road – Oriental Sports Center 20.34 (12.64) 2007–2011
Barcelona metro line 1 Barcelona Metro  Spain Estación de Fondo – Estación de Hospital de Bellvitge 20.20 (12.56) 1926-1989
Tozai Line Sapporo Municipal Subway  Japan Miyanosawa – Shin-Sapporo 20.1 (12.4) 1976–1999
Metro Madrid L-5 Madrid Metro  Spain Alameda de Osuna – Empalme 20.005 (12.5) 1968–2006
Barcelona metro line 9 Barcelona Metro  Spain Zona Universitaria – Aeroport T1 20.00 (12.5) 2004–2016
North East MRT Line Mass Rapid Transit (Singapore)  Singapore HarbourFront–Punggol 20.0 (12.43)[11] 2003–2011
Bucharest Metro Line M3 Bucharest Metro  Romania Preciziei – Anghel Saligny 20.0 (12.43) 1983–2008
Paris Métro Line 9 Paris Métro  France Pont de Sèvres – Mairie de Montreuil 19.6 (12.18) 1922–1937
Red, Yellow, Blue, and Green Lines Bay Area Rapid Transit, San Francisco  United States Balboa Park – West Oakland 19.5 (12.12) 1973
Kol'tsevaya Line Moscow Metro  Russia Circle route 19.4 (12.2) 1950–1954
Munich U-Bahn U3 Munich U-Bahn  Germany Moosach – Fürstenried West 19.4 (12.05) 1972–2009
Midosuji Line Osaka Metro  Japan Nakatsu – Nakamozu 19.1 (11.87) 1933–1987
Barcelona metro line 5 Barcelona Metro  Spain Vall d'Hebron – Cornella centre 19.00 (11.80) 1955-2010
Mexico City Metro Line 3 Mexico City Metro  Mexico La Raza – Universidad 18.7 (11.62) 1970–1983
Paris Métro Line 7 Paris Métro  France La Courneuve – 8 Mai 1945 – Villejuif – Louis Aragon 18.6 (11.6) 1910–1987
Line 3 Barcelona Metro  Spain Zona Universitària – Trinitat Nova 18.4 (11.44) 1925-2008
Line 1 Shanghai Metro  China Shanghai South Railway – Shanghai Circus World 18.1 (11.25) 1993–2004
Avtozavodskaya Line Minsk Metro  Belarus Kamennaya Gorka – Mogilevskaya 18.1 (11.25) 1990–2005
Line B Prague Metro  Czechia Rajská zahrada – Hůrka 18.0 (11.2) 1998
Helsinki Metro Helsinki Metro  Finland Kalasatama – Matinkylä 17.9 (11.12) 1982–2017
Line 2 (Athens Metro)[12] Athens Metro  Greece Anthoupoli – Elliniko 17.9 (11.12) 2013
Line 3 (Athens Metro)[12] Athens Metro  Greece Agia Marina – Doukissis Plakentias 17.8 (11.06) 2013
Washington, DC Metro Red Line Washington Metro  United States Union Station – Medical Center 17.8 (11.05) 1984
Tozai Line Kyoto Municipal Subway  Japan Uzumasa Tenjingawa-Yamashina-Rokujizo 17.5 (10.92) 2008
Maskoŭskaja line Minsk Metro  Belarus Pyatrowshchyna–Uruchcha 17.4 (10.81) 2012
Line 4 Barcelona Metro  Spain Trinitat Nova – La Pau 17.3 (10.76) 1908-1999
Tōzai Line Tokyo Metro  Japan Nakano–Minami-Sunamachi 17.0 (10.56) 1969
Mexico City Metro Line 1 Mexico City Metro  Mexico Observatorio – Metro Pantitlán 16.7 (10.38) 1984
Metro Madrid L-3 Madrid Metro  Spain Villaverde Alto – Moncloa 16.424 (10.2) 2007
Line 1 Chongqing Rail Transit  China Chaotianmen – Shapingba 16.4 (10.2) 2011
Metro Madrid 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) 2003
Seoul Subway Line 7
(shorter section)		 Seoul Metropolitan Rapid Transit Corporation  South Korea Suraksan – Konkuk University 16.0 (9.9) 1996
M3 Line Copenhagen Metro  Denmark Circle Route 15.5 km (9.6 mi) 2019
Line 3[13] 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
Paris Métro Line 12 Paris Métro  France Front Populaire – Mairie d'Issy 15.3 (9.5) 1910–2012
Syretsko-Pecherska Line Kyiv Metro  Ukraine Syrets – Pivdennyi Bridge 15.2 (9.4) 2004
Line 1 (Kolkata Metro) Kolkata Metro  India Mahanayak Uttam Kumar -Dum Dum 15.17 (9.38) 1995
Line 10 Chengdu Metro  China Taipingyuan – Shuangliu West 15.0 (9.32) 2019

World's longest subway tunnel sections under construction
Name System Country Stations Length Expected completion
Ligne 15 Paris Métro  France (Circle route, all underground) 75 km (47 mi) 2022–2030
Bolshaya Koltsevaya line Moscow Metro  Russia (Circle route, all underground) 69 km (43 mi)[14] 2018 partially;
other sections up to 2023
Line 18 Chengdu Metro  China Whole line is 77.123 km 66.16 km (41.11 mi) 2020
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)
 2029-2031
Line 18 Guangzhou Metro  China Guangzhou East railway station to Wanqingsha 65.3 km (40.6 mi) 2020
Line 13 Guangzhou Metro  China Whole lines is underground
(includes Phase II: Chaoyang – Zhucun is 33.6km and under construction)		 62.1 km (38.6 mi) Phase 1：2017
Phase 2：2023
Thomson–East Coast Line Mass Rapid Transit (Singapore)  Singapore Woodlands North to Sungei Bedok
(Extension to Tanah Merah expected beyond 2030)		 56.4 km (35.0 mi) 2020-2024
Line 17 Chengdu Metro  China Whole line 81.48 km and 4.442 km are not underground in Phase 1 and 2 46.5 km (28.9 mi) 2020 for Phase 1 underground section (21.71km) / 2024 for Phase 2 (24.8km)
Line 13 Shenzhen Metro  China Whole line is underground 45.72 km (28.41 mi) Phase 1：2022
North extension (Phase 2)：2024
South extension：2025
L9 / L10 Barcelona Metro  Spain 43.7 km (27.2 mi)
(incl. branches)		 2016 partially;
central section unknown
Line 11 Guangzhou Metro  China (Circle route, all underground) 43.2 km (26.8 mi) 2023
Line 19 Chengdu Metro  China (Whole phase 2 is 42.87 km and all is underground) 42.87 km (26.64 mi) 2022
Line 8 Chengdu Metro  China (Phase 1 is 28.8km, phase 2 is 7.94km) 36.74 km (22.83 mi) 2020
Mumbai Metro Line 3 Mumbai Metro  India Cuffe Parade-SEEPZ 33.02 km (20.52 mi) 2021
Chengdu Metro Line 13 Chengdu Metro  China Qiligou ~ Longhua Temple underground section 29.07 km (18.06 mi) 2024
Purple Line Extension Los Angeles Metro  United States Westwood/VA Hospital - Union Station 24.3 km (15.1 mi) 2025-2026
Line 30 Chengdu Metro  China (Phase 1 is 26.28 km) 26.28 km (16.33 mi) 2024
Line 27 Chengdu Metro  China Whole line is 24.86km, but only 17.34km underground 17.34 km (10.77 mi) 2024

See also

References
  1. "Chengdu Metro Line 6 had a playful moment! For real/成都地铁6号线这回"皮"了一把！真的，不豁你" (in Chinese). 搜狐网. 28 July 2018.
  2. "Stunning first train is revealed for Chengdu Metro line 6/成都地铁6号线首列车辆惊艳亮相！" (in Chinese). 成都高新检察. 30 July 2018.
  3. "Chengdu builds the longest subway in West China_line 6 is 73km/成都新建西部地区最长地铁_地铁6号线全长73km" (in Chinese). 成都地铁吧. 15 May 2020.
  4. "Updates on Chengdu Metro's 5 new lines this year/快马加鞭！成都地铁今年开通的5条新线运营筹备进展请阅" (in Chinese). 四川在线 （编辑：彭焘）. 20 April 2020.
  5. "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.
  6. "Factsheet on Circle Line Extension". www.lta.gov.sg. 28 November 2011. Retrieved 13 June 2019.
  7. "World's longest railway tunnel" 1984–1988
  8. Note that both lines are served continuously by the A train within a single tunnel.
  9. "Metro to bridge Delhi-Gurgaon divide today". The Hindu. Chennai, India. 3 September 2010. Retrieved 19 October 2010.
  10. Rajesh Ahuja (29 August 2010). "Gurgaon Metro set for operationalisation next week". Retrieved 19 October 2010.
  11. "North East Line". www.lta.gov.sg. Retrieved 13 June 2019.
  12. "Urban Rail Transport SA :METRO Line 1". Retrieved 30 September 2014.
  13. "3-as metróvonal jellemzői". Metros.hu (in Hungarian). Retrieved 27 March 2016.
  14. https://stroi.mos.ru/metro/tretii-peresadochnyi-kontur
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