Wikipedia
List of longest tunnels
This list of longest tunnels ranks tunnels that are at least 13 km (8.1 mi) long. Only continuous tunnels are included. Pipelines, even those that are buried, are excluded. The longest tunnels have been constructed for water distribution, followed by tunnels for railways.
World's longest tunnels (in use) edit
| Type | Name | Location | Length | Year | Comment |
|---|---|---|---|---|---|
| Water supply | Delaware Aqueduct | New York State, United States | 137,000 m (85.128 mi) | 1945 | 4.1 m in diameter (13.2 m2). New York City's main water supply tunnel. |
| Water supply | Päijänne Water Tunnel | Southern Finland, Finland | 120,000 m (74.565 mi) | 1982 | 16 m2 cross section. Main water supply tunnel for southern Finland, including Helsinki, drilled through solid rock. |
| Metro | Suzhou Rail Transit Line 3-11 | Suzhou, China | 86,542 m (53.775 mi) | 2019–2023 | Suzhou Rail Transit Line 11 and Line 3 are connected at Weiting station with through trains passing by. Longest metro tunnel |
| Water supply | Dahuofang Water Tunnel | Liaoning, China | 85,320 m (53.015 mi) | 2009 | 8 m in diameter[1] (50 m2 cross section) |
| Water supply | Orange–Fish River Tunnel | South Africa | 82,800 m (51.450 mi) | 1972 | Longest continuous enclosed aqueduct in the Southern Hemisphere (22.5 m2 cross section). Built to divert water from the Orange River to the Great Fish River. |
| Water supply | Bolmen Water Tunnel | Kronoberg/Scania, Sweden | 82,000 m (50.952 mi) | 1987 | 8 m2 cross section |
| Metro | Chengdu Metro Line 6 | Chengdu, China | 68,223 m (42.392 mi) | 2020 | Longest (independent single-line) metro/rapid transit tunnel |
| Hydroelectric | Neelum–Jhelum Hydropower Tunnel | Muzaffarabad, Azad Kashmir, Pakistan | 68,000 m (42.253 mi) | 2017 | Part of the 969 MW Neelum–Jhelum Hydropower Plant |
| Wastewater | Tunel Emisor Oriente | Mexico City, Mexico | 62,500 m (38.836 mi) | 2019[2] | 7 m in diameter. Longest wastewater tunnel. |
| Metro | Qingdao Metro Line 1 | Qingdao, China | 59,818 m (37.169 mi) | 2020–2021 | Second longest metro/rapid transit tunnel |
| Metro | Guangzhou Metro Line 18 | Guangzhou, China | 58,300 m (36.226 mi) | 2021 | |
| Metro | Guangzhou Metro Line 3 | Guangzhou, China | 57,930 m (35.996 mi) (Excl. branch) | 2005–2018 | |
| Metro | Moscow Metro Bolshaya Koltsevaya line | Moscow, Russia | 57,538 m (35.752 mi)[3][4] (Excl. branch) | 2018–2023[5] | Longest metro/rapid transit circular line |
| Railway Twin Tube | Gotthard Base Tunnel | Central Swiss Alps, Switzerland | 57,104 m (35.483 mi) and 57,017 m (35.429 mi) | 2016 | Longest conventional railway tunnel. It is also the world's longest transit tunnel by geodetic distance; 55.782 km (34.661 mi) between the two portals. Total 151.84 km (94.35 mi) of broken out tunnels through solid rocks.[6][7] Part of the NRLA. |
| Metro | Beijing Subway Line 10 | Beijing, China | 57,100 m (35.480 mi) | 2008–2013 | |
| Railway Single Tube | Seikan Tunnel | Tsugaru Strait, Japan | 53,850 m (33.461 mi) | 1988 | 74 m2; longest railway tunnel until 2016. Longest tunnel with an undersea section, running between Honshu and Hokkaido. Undersea section measures 23.3 kilometres (14.5 mi). |
| Metro | Beijing Subway Line 6 | Beijing, China | 53,400 m (33.181 mi) | 2012–2018 | |
| Water supply | Želivka Water Tunnel[8] | Central Bohemian Region, Czech Republic | 51,970 m (32.293 mi) | 1972 | 9–12 m2 |
| Metro | Seoul Subway: Line 5 | Seoul, South Korea | 51,700 m (32.125 mi) (longest branch) | 1995–2021 | Longest metro/rapid transit tunnel until Guangzhou Metro Line 3 extension opened in 2010, crosses west to east under the Seoul Capital Area. |
| Metro | Istanbul Metro (Line M11) | Istanbul, Turkey | 51,500 m (32.001 mi) | 2023-2024 | Longest tunnel in Turkey |
| Dewatering Adit | Rothschönberger Stolln[9] | Freiberg Mining Field, Germany | 50,900 m (31.628 mi) | 1844–1882 | 6 m2 cross section, longest tunnel until 1945. Part of a UNESCO World Heritage Site. |
| Railway Twin Tube | Channel Tunnel | English Channel, United Kingdom/France | 50,450 m (31.348 mi) | 1994 | Second longest railway tunnel until 2016. Longest underwater section, longest international tunnel (2×45 m2 + 1×18 m2), running between Folkestone, Kent, and Coquelles, Pas-de-Calais. |
| Railway Single Tube | Yulhyeon Tunnel | Seoul Capital Area, South Korea | 50,300 m (31.255 mi)[10] | 2016[11] | 107 m2, part of the Suseo high-speed railway. |
| Water supply | River Arpa – Lake Sevan tunnel[12][13] | Armenia (at the time of construction Soviet Union) | 48,358 m (30.048 mi)[14] | 1981 | Longest tunnel built to restore ecological balance. Transfers water from the Arpa to Lake Sevan to recover its level.[15] |
| Water supply | Pahang – Selangor Raw Water Transfer Project[16][17] | Pahang & Selangor, Malaysia | 44,600 m (27.713 mi) | 2014 | 5.2 m in diameter |
| Metro | Wuhan Metro Line 2 | Wuhan, China | 44,347 m (27.556 mi) | 2012–2019 | |
| Metro | Shanghai Subway: Line 7 | Shanghai, China | 44,200 m (27.465 mi) | 2009–2010 | |
| Water supply | #1 Tunnel, Yellow River Diversion to Shanxi North Line | Shanxi, China | 43,670 m (27.135 mi) | 2011 | See South–North Water Transfer Project |
| Water supply | #7 Tunnel, Yellow River Diversion to Shanxi South Line | Shanxi, China | 43,500 m (27.030 mi) | 2002 | See South–North Water Transfer Project |
| Metro | Beijing Subway Line 8 | Beijing, China | 42,600 m (26.470 mi) | 2012–2021 | |
| Metro | Shanghai Metro Line 15 | Shanghai, China | 42,300 m (26.284 mi) | 2021 | |
| Metro | Chengdu Metro Line 5 | Chengdu, China | 42,300 m (26.284 mi) | 2019 | |
| Metro | Beijing Subway Line 14 | Beijing, China | 42,000 m (26.098 mi) | 2015–2021 | |
| Metro | Tianjin Metro Line 6 | Tianjin, China | 42,000 m (26.098 mi) | 2016–2021 | |
| Metro | Downtown line | MRT, Singapore | 41,900 m (26.035 mi)[18][19] | 2013–2017 | Longest rapid transit line in South East Asia |
| Metro | Nanjing Metro Line 3 | Nanjing, China | 41,567 m (25.829 mi) | 2011–2015 | From Xinghuolu station to Mozhoudonglu station. |
| Metro | Suzhou Rail Transit: Line 4 | Suzhou, China | 41,500 m (25.787 mi) | 2017 | |
| Metro | Serpukhovsko-Timiryazevskaya Line (Altufyevo – Bulvar Dmitriya Donskogo) | Moscow Metro, Russia (construction started at the time of Soviet Union) | 41,470 m (25.768 mi) | 1983–2002 | |
| Metro | Madrid Metro: Line 12 (MetroSur) | Madrid, Spain | 40,900 m (25.414 mi) | 1999–2003 | |
| Metro | Tocho-mae – Shiodome – Hikarigaoka (Toei Oedo Line) | Tokyo, Japan | 40,700 m (25.290 mi) | 1991–2000 | Tokyo Metropolitan Bureau of Transportation |
| Hydroelectric | Kárahnjúkar Hydropower Plant | Fljótsdalshreppur, Iceland | 39,700 m (24.668 mi) | 2003–2007 | 7.2–7.6 meters in diameter (45 m2 cross section). Part of a wider complex of tunnels that are 72 kilometers in length combined. |
| Water supply | Quabbin Aqueduct | Massachusetts, United States | 39,600 m (24.606 mi) | 1933 | |
| Metro | Chengdu Metro Line 4 | Chengdu, China | 39,300 m (24.420 mi) | 2015–2017 | |
| Metro | Chengdu Metro Line 7 | Chengdu, China | 38,600 m (23.985 mi) | 2017 | |
| Metro | Seoul Subway: Line 3 (Apgujeong–Ogeum) | Seoul, South Korea | 38,200 m (23.736 mi) | 1985–2010 | |
| Metro | Kaluzhsko-Rizhskaya Line (Novoyasenevskaya – Medvedkovo) | Moscow Metro, Russia (at the time of construction Soviet Union) | 37,800 m (23.488 mi) | 1958–1990 | Longest railway tunnel 1978–1984 and from November 1987 till March 1988; longest metro/rapid transit tunnel 1990–1995 |
| Metro | Shenzhen Subway: Luobao Line | Shenzhen, China | 37,497 m (23.300 mi) | 2009–2011 | |
| Metro | Chengdu Metro Line 1 | Chengdu, China | 37,470 m (23.283 mi) (Excl. branch) | 2010–2018 | |
| Water supply | Harold D. Roberts Tunnel[20] | Colorado, United States | 37,464 m (23.279 mi) | 1962 | Diverts water from the Colorado River watershed to the South Platte River watershed for use in the Denver metropolitan area. Flows across Continental Divide. 4,465 feet (1,361 m) below the surface at its deepest point. |
| Metro | Shenzhen Subway: Shekou Line | Shenzhen, China | 36,146 m (22.460 mi) | 2010–2011 | |
| Water supply | Dawushan Tunnel, Niulan River Diversion to Dianchi | Yunnan, China | 36,137 m (22.454 mi) | 2013 | |
| Metro | Circle line | MRT, Singapore | 35,700 m (22.183 mi) | 2009–2012 | |
| Metro | Busan Metro: Line 2 (Dongwon–Jangsan) | Busan, South Korea | 35,500 m (22.059 mi) | 1999–2009 | |
| Railway | Songshan Lake Tunnel[21] | Dongguan, China | 35,391 m (21.991 mi) | 2016 | Dongguan–Huizhou intercity railway, longest railway tunnel in China |
| Metro | Seoul Subway: Line 6 | Seoul, South Korea | 35,100 m (21.810 mi) | 2001 | |
| Metro | Seoul Subway: Line 7 (Cheongdam–Bupyeong-gu Office) | Seoul, Incheon, Bucheon and Gwangmyeong in South Korea | 35,100 m (21.810 mi) | 2000–2012 | |
| Metro | Tianjin Metro: Line 5 | Tianjin, China | 34,800 m (21.624 mi) | 2018–2021 | |
| Railway Single Track | Lötschberg Base Tunnel | Bernese Alps, Switzerland | 34,577 m (21.485 mi) | 2007 | Longest land railway tunnel until Gotthard Base Tunnel was opened; two single track tubes along 12 km, only single track along 22 km. Part of the NRLA. |
| Metro | Istanbul Metro (Line M4) | Istanbul, Turkey | 34,050 m (21.158 mi) | 2012 | |
| Water supply | Tyne-Tees Tunnel | England, United Kingdom | 34,000 m (21.127 mi) | 1983 (and earlier) | Northumbrian water supply tunnel. |
| Metro | Guangzhou Metro: Line 8 | Guangzhou, China | 33,900 m (21.064 mi) | 2010–2020 | |
| Metro | Lyublinsko-Dmitrovskaya Line (Zyablikovo – Seligerskaya) | Moscow Metro, Russia (construction started at the time of Soviet Union) | 33,400 m (20.754 mi) | 1995–2018 | |
| Metro | Madrid Metro: Line 7 | Madrid, Spain | 32,919 m (20.455 mi) | 1974–2007 | |
| Railway Twin Tube | New Guanjiao Tunnel | Qinghai, China | 32,645 m (20.285 mi) | 2014[22] | Longest tunnel on the upgraded dual-track Xining–Golmud section of Qinghai–Tibet Railway, longest railway tunnel in China until 2016, 3323.58–3380.97 meters above sea level |
| Metro | Meijo Line – Meikō Line | Nagoya Municipal Subway, Japan | 32,400 m (20.132 mi) | 1965–2004 | |
| Metro | Guangzhou Metro: Line 2 | Guangzhou, China | 32,000 m (19.884 mi) | 2010 | |
| Metro | Rathaus Spandau–Rudow (U7) | Berlin U-Bahn, Germany | 31,800 m (19.760 mi) | 1924–1984 | |
| Water supply | Gerede Water Transmission Tunnel[23] | Ankara, Turkey | 31,592 m (19.630 mi) | 2019[24] | 5.2 m in diameter |
| Metro | Seoul Subway: Bundang Line (Seoul Forest–Jukjeon) | Seoul, Seongnam and Yongin in South Korea | 31,400 m (19.511 mi) | 1994–2012 | |
| Metro | Daegu Metro: Line 2 | Daegu and Gyeongsan in South Korea | 31,400 m (19.511 mi) | 2005–2012 | |
| Wastewater | Milwaukee Metropolitan Sewerage District Deep Tunnel Phase 1 | Milwaukee County, Wisconsin, United States | 31,221 m (19.400 mi) | 1993 | 405 million gallons of combined sewage storage designed to prevent sewage overflow into Lake Michigan. The largest of three phases, totalling 521 million gallons of storage.[25] |
| Metro | Beijing Subway: Line 1 | Beijing, China | 31,040 m (19.287 mi) | 1971–2000 | |
| Metro | Bucharest Metro: Line M1 | Bucharest, Romania | 31,010 m (19.269 mi) | 1979–1992 | 8,670 m, shared with M3 line. Nether less one continuous tunnel. |
| Metro | Côte-Vertu – Montmorency (Line 2 Orange) | Montreal Metro, Canada | 30,798 m (19.137 mi) | 1966–2007 | |
| Metro | Shanghai Subway: Line 2 | Shanghai, China | 30,187 m (18.757 mi) | 2000 | |
| Metro | Parnas – Kupchino (line 2) | Saint Petersburg Metro, Russia (construction started at the time of Soviet Union) | 30,100 m (18.703 mi) | 1961–2006 | |
| Metro | Guangzhou Metro: Line 5 | Guangzhou, China | 29,900 m (18.579 mi) | 2009 | |
| Water supply | Shandaken Tunnel | Catskill Mountains, New York, United States | 29,780 m (18.504 mi) | 1924 | |
| Metro | Shanghai Subway: Line 8 | Shanghai, China | 29,650 m (18.424 mi) | 2007–2009 | |
| Metro | Prospekt Veteranov – Devyatkino (line 1) | Saint Petersburg Metro, Russia (at the time of construction Soviet Union) | 29,600 m (18.393 mi) | 1955–1978 | |
| Metro | Shanghai Subway: Line 10 | Shanghai, China | 29,600 m (18.393 mi) | 2010 | |
| Water supply | Evinos – Mornos Tunnel[26][27] | Aetolia-Acarnania, Greece | 29,400 m (18.268 mi) | 1995 | |
| Metro | Chengdu Metro Line 2 | Chengdu, China | 29,000 m (18.020 mi) | 2012–2013 | Only includes phases 1 and 2 |
| Water supply | Hultman Aqueduct[28] | Eastern Massachusetts, United States | 28,640 m (17.796 mi) | 1939 | 11.5 ft (3.5 m) to 14 ft (4.3 m) diameter (15m2 cross section); offline for rehabilitation |
| Metro | Sydney Metro Northwest | Sydney, New South Wales, Australia | 28,500 m (17.709 mi) | 2019 | The line incorporates the existing 13 km Epping to Chatswood rail link. It forms part of the wider Sydney Metro project. |
| Railway Twin Tube | Guadarrama Tunnel[29] | Sierra de Guadarrama, Spain | 28,377 m (17.633 mi) | 2007 | |
| Water supply | MetroWest Water Supply Tunnel[30] | Eastern Massachusetts, United States | 28,300 m (17.585 mi) | 2003 | 14 ft (4.3 m) diameter (15m2 cross section) |
| Railway Twin Tube | West Qinling Tunnel | Gansu, China | 28,236 m (17.545 mi) | 2016 | Chongqing–Lanzhou railway |
| Metro | Taipei Metro: Blue Line | Taipei, Taiwan | 28,200 m (17.523 mi) | 1999–2015 | |
| Metro | Beijing Subway: Line 4 | Beijing, China | 28,165 m (17.501 mi) | 2009–2010 | |
| Metro | Seoul Subway: Line 9 (Gimpo Airport–Sports Complex) | Seoul, South Korea | 28,100 m (17.461 mi) | 2009–2015 | |
| Railway Single Tube | Taihang Tunnel[31] | Taihang Mountains, China | 27,848 m (17.304 mi) | 2007 | On Shijiazhuang–Taiyuan high-speed railway |
| Metro | Morden–East Finchley (Northern line) | London Underground, England, United Kingdom | 27,800 m (17.274 mi) | 1890–1940 | Longest railway tunnel in UK |
| Metro | Shenyang Subway: Line 1 | Shenyang, China | 27,800 m (17.274 mi) | 2010 | |
| Water supply | Melamchi Water Tunnel[32] | Melamchi to Kathmandu, Nepal | 27,000 m (16.777 mi) | 2021[33] | See Melamchi Water Supply Project |
| Metro | Seoul Subway: Incheon Line 1 (Bakchon–International Business District) | Incheon, South Korea | 27,000 m (16.777 mi) | 1999–2009 | |
| Metro | Dainichi–Nagahara (Tanimachi Line) | Osaka Metro, Japan | 26,900 m (16.715 mi) | 1967–1983 | |
| Particle accelerator | LEP Tunnel[34] | CERN, Switzerland/France | 26,659 m (16.565 mi) | 1988 (breakthrough) | 11.3–15.9 m2 circular ring, now used by Large Hadron Collider |
| Railway Single Tube | Hakkōda Tunnel (Tōhoku Shinkansen) | Hakkōda Mountains, Japan | 26,455 m (16.438 mi) | 2010 | 64–74 m2 |
| Water supply | Şanlıurfa Irrigation Tunnels | Turkey | 26,400 m (16.404 mi) | 2005[35] | |
| Metro | Shanghai Subway: Line 9 | Shanghai, China | 26,263 m (16.319 mi) | 2007–2010 | |
| Hydroelectric | Gilgel Gibe II Power Station headrace tunnel | Ethiopia | 26,000 m (16.156 mi) | 2005–2009 | Tunnel partially collapsed, was repaired in 2010.[36][37] |
| Water supply | #5 Tunnel, Yellow River Diversion to Shanxi South Line | Shanxi, China | 26,000 m (16.156 mi) | 2002 | See South–North Water Transfer Project |
| Metro | Daegu Metro: Line 1 | Daegu, South Korea | 25,900 m (16.094 mi) | 1997–2002 | |
| Metro | MRT Blue Line | Bangkok, Thailand | 25,800 m (16.031 mi) | 2004 | Second phase will be open in April 2019 |
| Railway Single Tube | Iwate-Ichinohe Tunnel | Ōu Mountains, Japan | 25,810 m (16.038 mi) | 2002 | |
| Water supply | Sudbury Aqueduct | Eastern Massachusetts, United States | 25,750 m (16.000 mi) | 1878 | Emergency backup use |
| Metro | Suzhou Rail Transit: Line 1 | Suzhou, China | 25,739 m (15.993 mi) | 2007–2011 | |
| Metro | Line 3 (Athens Metro)[38] | Athens, Greece | 25,200 m (15.659 mi) | 1992–2022 | Line 3 is actually 46.5 km long, but only 25.2 km of it are underground. |
| Metro | Helsinki metro (Kivenlahti–Sörnäinen) | 25,200 m (15.659 mi) | 1982–2022 | ||
| Metro | Taipei Metro: Orange Line (Huilong – Nanshijiao) | Taipei, Taiwan | 25,100 m (15.596 mi) (Excl. branch) | 1998–2013 | |
| Railway Twin Tube | Musil Tunnel[39][40] | Wonju–Jecheon (Jungang Line), South Korea | 25,080 m (15.584 mi) | 2021[41] | |
| Railway Twin Tube | Pajares Base Tunnel | Asturias/León, Spain | 24,667 m (15.327 mi) | 2023 | |
| Road | Lærdal Tunnel | Lærdal – Aurland, Norway | 24,510 m (15.230 mi) | 2000 | The longest road tunnel in the world |
| Metro | Yellow Line (Delhi Metro): GTB Nagar – Qutub Minar[42] | Delhi, India | 24,000 m (14.913 mi) | 2004–2010 | Longest tunnel in India |
| Metro | Madrid Metro: Line 1 | Madrid, Spain | 23,876 m (14.836 mi) | 1919–2007 | |
| Railway | Lainzer/Wienerwaldtunnel | west of Vienna, Austria | 23,844 m (14.816 mi) | 2012 | Breakthrough 2007 |
| Wastewater | Harbour Area Treatment Scheme (HATS) Stage 1[43] | Hong Kong, China (construction started in British Hong Kong) | 23,600 m (14.664 mi) | 2001 | |
| Water supply | Eucumbene-Snowy Tunnel[44][45] | New South Wales, Australia | 23,500 m (14.602 mi) | 1965 | Part of the 145 km tunnel network of the Snowy Mountains Scheme |
| Railway | South Lüliangshan Tunnel[46] | Shanxi, China | 23,473 m (14.585 mi) | 2014[47] | 2 tubes, part of Shanxi–Henan–Shandong railway |
| Metro | Madrid Metro: Line 6 | Madrid, Spain | 23,472 m (14.585 mi) | 1979–2007 | |
| Metro | Angrignon – Honoré-Beaugrand (Line 1 Green) | Montreal Metro, Canada | 23,262 m (14.454 mi) | 1966–2007 | |
| Metro | Warsaw Metro Line 1: Kabaty – Młociny | Warsaw, Poland | 23,100 m (14.354 mi) | 1983–2008 | |
| Metro | Beijing Subway: Line 2 | Beijing, China | 23,100 m (14.354 mi) | 1969–1987 | |
| Hydroelectric | Xinma Hydroelectric Power Station Water Tunnel | Sichuan, China | 22,975 m (14.276 mi) | 2009 | |
| Railway | Iiyama Tunnel[48] | Iiyama, Japan | 22,225 m (13.810 mi) | 2015 | |
| Railway | Daishimizu Tunnel | Mount Tanigawa, Japan | 22,221 m (13.807 mi) | 1982 | Longest railway tunnel until Seikan Tunnel was opened. |
| Water supply | Eucumbene-Tumut Tunnel[44] | New South Wales, Australia | 22,200 m (13.794 mi) | 1959 | Part of the 145 km tunnel network of the Snowy Mountains Scheme |
| Road | WestConnex | Sydney, New South Wales, Australia | 21,800 m (13.546 mi) | 2023 (2019–2020 partial completion) | New M4 Tunnels opened 2019, WestConnex M8 opened 2020 |
| Railway | Daegwallyeong Tunnel | Pyeongchang–Gangneung (Gyeonggang Line), South Korea | 21,755 m (13.518 mi) | 2017[49] | |
| Water supply | Vorotan–Arpa Tunnel[50] | Armenia (construction started at the time of Soviet Union) | 21,652 m (13.454 mi) | 2004 | |
| Particle accelerator (incomplete) | UNK proton accelerator | Protvino, Russia (construction started at the time of Soviet Union) | 21,000 m (13.049 mi) | 1994 (breakthrough) | Construction stopped after finishing of main circle tunnel, future is unclear |
| Metro | Guangfo Metro | Foshan, China | 20,900 m (12.987 mi) | 2010 | |
| Railway Twin Tube | Luliangshan Tunnel | Shanxi, China | 20,785 m (12.915 mi) | 2011 | 2 tubes: left tube is 20785 meters, right tube is 20738 meters |
| Metro | Shanghai Subway: Line 4 | Shanghai, China | 20,740 m (12.887 mi) | 2005–2007 | |
| Metro | Barcelona Metro: Line 1 | Barcelona, Spain | 20,700 m (12.862 mi) | 1926–1992 | |
| Hydroelectric | Ward Tunnel[citation needed] | California, United States | 20,610 m (12.806 mi) | 1920–1925 | Part of the Big Creek Hydroelectric Project of the Southern California Edison Company. Excavated through solid granite. |
| Metro | Busan Metro: Line 1 (Hadan-Busan Nat'l Univ. of Education) | Busan, South Korea | 20,600 m (12.800 mi) | 1985–1994 | |
| Metro | Xian Subway: Line 2 | Xi'an, China | 20,500 m (12.738 mi) | 2011 | |
| Metro | Daejeon Metro: Line 1 | Daejeon, South Korea | 20,470 m (12.719 mi) | 2006–2007 | |
| Metro | Nanjing Metro Line 2 | Nanjing, China | 20,380 m (12.664 mi) | 2010 | |
| Metro | Shanghai Subway: Line 6 | Shanghai, China | 20,336 m (12.636 mi) | 2007 | |
| Railway | Geumjeong Tunnel[51] | Busan, South Korea | 20,323 m (12.628 mi) | 2010 | Gyeongbu high-speed railway |
| Railway Twin Tube | Wushaoling Tunnel | Wuwei, China | 20,060 m (12.465 mi) | 2006–2007 | 2 tubes: left tube is 20060 meters, right tube is 20050 meters |
| Metro | Istanbul Metro (Line M5) | Istanbul, Turkey | 20,000 m (12.427 mi) | 2017–2018 | M5 line (Üsküdar-Çekmeköy) is 20 km with depot line. Line is 30.9 km with Çekmeköy-Sultanbeyli Phase. |
| Electric power transmission tunnel | The London Connection[52] | London, England, United Kingdom | 20,000 m (12.427 mi) | 2005[53] | National Grid plc, 3-metre diameter, 400 kilovolt circuit |
| Railway Twin Tube | Simplon Tunnel | Lepontine Alps, Switzerland/Italy | 19,803 m (12.305 mi) | 1906 | Parallel tunnel was opened in 1922 (19,824 m long); longest transit tunnel until Daishimizu Tunnel was opened. Part of the NRLA. |
| Railway | Follo Line | Oslo, Norway | 19,500 m (12.117 mi) | 2022[54][55] | Groundbreaking 2014[56] |
| Metro | Koltsevaya Line (Circle Line) | Moscow Metro, Russia (at the time of construction Soviet Union) | 19,400 m (12.055 mi) | 1950–1954 | |
| Hydroelectric | Futang Hydroelectric Power Station Water Tunnel | Sichuan, China | 19,319 m (12.004 mi) | 2004[57] | |
| Metro | Seoul Subway: Bundang Line (Suwon station–Jukjeon station) | Yongin and Suwon in South Korea | 19,300 m (11.992 mi) | 2007–2013 | |
| Railway Single Tube | Qamchiq Tunnel[58] | Angren–Pap railway, Uzbekistan | 19,200 m (11.930 mi) | 2016 | Longest non-metro railway tunnel in ex-USSR |
| Metro | North East line | MRT, Singapore | 19,200 m (11.930 mi) | 2003–2011 | World's first fully automated and driverless underground rapid transit line |
| Metro | Suzhou Rail Transit: Line 2 | Suzhou, China | 19,146 m (11.897 mi) | 2009–2012 | |
| Metro | Maskoŭskaja Line | Minsk Metro, Belarus (construction started at the time of Soviet Union) | 19,100 m (11.868 mi) | 1984–2014 | |
| Railway Single Track | Vereina | Silvretta, Switzerland | 19,058 m (11.842 mi) | 1999 | Single track with passing loops, metre gauge |
| Metro | Seoul Subway: Line 4 (Ssangmun–Ichon) | Seoul, South Korea | 19,000 m (11.806 mi) | 1980 | |
| Wastewater | Harbour Area Treatment Scheme (HATS) Stage 2[59] | Hong Kong, China | 18,800 m (11.682 mi) | 2015 | |
| Railway | Shin-Kanmon Tunnel | Kanmon Straits, Japan | 18,713 m (11.628 mi) | 1975 | |
| Hydroelectric | Shiziping Hydroelectric Power Station Water Tunnel | Sichuan, China | 18,712 m (11.627 mi) | 2010[60] | |
| Railway Single Tube | Vaglia | Bologna – Firenze, Italy | 18,711 m (11.626 mi) | 2009 | Bologna–Florence high-speed railway |
| Hydroelectric | Baoxing Hydroelectric Power Station Water Tunnel | Sichuan, China | 18,676 m (11.605 mi) | 2007 | |
| Railway Single Tube | Apennine Base Tunnel | Tuscan-Emilian Apennines, Italy | 18,507 m (11.500 mi) | 1934 | |
| Metro | Obolonsko–Teremkivska line | Kyiv Metro, Ukraine (construction started at the time of Soviet Union) | 18,480 m (11.483 mi) | 1976–2013 | |
| Metro | Istanbul Metro (Line M3) | Istanbul, Turkey | 18,460 m (11.471 mi) | 2013-2022 | |
| Railway Twin Tube | Qinling Tunnel I-II | Qin Mountains, China | 18,460 m (11.471 mi) | 2000 | 2 tubes: left tube is 18460 meters, right tube is 18456 meters[61] |
| Hydroelectric | Tatev Hydroelectric Power Station Water Tunnel | Armenia (at the time of construction Soviet Union) | 18,400 m (11.433 mi) | 1970 | |
| Road Twin Tube | Yamate Tunnel | Tokyo, Japan | 18,200 m (11.309 mi) | 2015 | |
| Railway | South Taihangshan Tunnel | Shanxi, China | 18,125 m (11.262 mi) | 2014[62] | 2 tubes, part of Shanxi–Henan–Shandong railway |
| Metro | Shanghai Subway: Line 1 | Shanghai, China | 18,110 m (11.253 mi) | 1995 | |
| Metro | Avtozavodskaya Line | Minsk Metro, Belarus (construction started at the time of Soviet Union) | 18,100 m (11.247 mi) | 1990–2005 | |
| Road Twin Tube | Zhongnanshan Tunnel | Shaanxi, China | 18,040 m (11.210 mi) | 2007 | The longest road tunnel in China |
| Metro | Line 2 (Athens Metro)[38] | Athens, Greece | 17,900 m (11.123 mi) | 1991–2013 | |
| Metro | Beijing Subway: Line 5 | Beijing, China | 17,825 m (11.076 mi) | 2007 | |
| Hydroelectric | Shuakhevi headrace and pressure tunnel | Shuakhevi, Adjara, Georgia | 17,800 m (11.060 mi)[63] | 2013–2017 | |
| Metro | Ankara Metro (AKM-Koru) | Ankara, Turkey | 19,660 m (12.216 mi) | 1997–2014 | M1 line is tunnel in Kızılay between AKM, M2 line is completely underground. |
| Road | Jingpingshan | Sichuan, China | 17,500 m (10.874 mi) | 2008 | The deepest transportation tunnel in China |
| Metro | Shenzhen Subway: Longgang Line | Shenzhen, China | 17,333 m (10.770 mi) | 2010–2011 | |
| Metro | Kholodnohirsko–Zavodska Line | Kharkiv Metro, Ukraine (at the time of construction Soviet Union) | 17,300 m (10.750 mi) | 1975–1978 | |
| Metro | Seoul Subway: Shinbundang Line | Seoul and Seongnam in South Korea | 17,300 m (10.750 mi) | 2011 | |
| Water supply | Mavi Tünel (Blue Tunnel)[64] | Konya, Turkey | 17,034 m (10.584 mi) | 2012 | Breakthrough 2007 |
| Road | Gotthard Road Tunnel | Lepontine Alps, Switzerland | 16,918 m (10.512 mi) | 1980 | |
| Metro | Guangzhou Metro: Line 4 | Guangzhou, China | 16,790 m (10.433 mi) | 2005 | |
| Metro | İzmir Metro Line M1 | İzmir, Turkey | 16,750 m (10.408 mi) | 2000–2023 | |
| Metro | Barcelona Metro: Line 4 | Barcelona, Spain | 16,700 m (10.377 mi) | 1929–1999 | |
| Metro | Seoul Subway: Line 2 (Jamsil–Sillim) | Seoul, South Korea | 16,700 m (10.377 mi) | 1980–1984 | |
| Metro | Barcelona Metro: Line 3 | Barcelona, Spain | 16,600 m (10.315 mi) | 1924–2001 | |
| Metro | Barcelona Metro: Line 5 | Barcelona, Spain | 16,600 m (10.315 mi) | 1959–1983 | |
| Water supply | Murrumbidgee-Eucumbene Tunnel[44] | New South Wales, Australia | 16,600 m (10.315 mi) | 1961 | Part of the 145 km tunnel network of the Snowy Mountains Scheme |
| Metro | Istanbul Metro (Line M2) | Istanbul, Turkey | 16,500 m (10.253 mi) | 2000–2009 | |
| Metro | Beijing Subway: Line 9 | Beijing, China | 16,500 m (10.253 mi) | 2011–2012 | |
| Hydroelectric | Jinkang Hydroelectric Power Station Water Tunnel | Sichuan, China | 16,490 m (10.246 mi) | 2006 | |
| Metro | Madrid Metro: Line 8 | Madrid, Spain | 16,467 m (10.232 mi) | 1998–2007 | |
| Metro | Guangzhou Metro: Line 1 | Guangzhou, China | 16,449 m (10.221 mi) | 1997 | |
| Metro | Madrid Metro: Line 3 | Madrid, Spain | 16,424 m (10.205 mi) | 1939–2007 | |
| Railway | Rokkō Tunnel[65] | Mount Rokkō, Japan | 16,250 m (10.097 mi) | 1972 | |
| Railway | Solan Tunnel[66] | Taebaek, Gangwon-do, South Korea | 16,240 m (10.091 mi) | 2012 | Taebaek Line, includes a spiral |
| Hydroelectric | Kemano T1 and T2[67] | CAN Kemano, Canada | 16,000 m (9.942 mi) | 1954-2022 | Twin 16 km hydroelectric tunnels. T1 was completed in 1954 and T2 was completed in May, 2022.[68] Both are in operation. |
| Metro | Seoul Subway: Line 7 (Suraksan–Konkuk University) | Seoul, South Korea | 16,000 m (9.942 mi) | 1996 | |
| Railway | Münsterertunnel | Tyrol, Austria | 15,990 m (9.936 mi) | 2012 | Longest tunnel in Austria. |
| Railway | Xiangshan Tunnel 象山隧道 | Fujian, China | 15,917 m (9.890 mi) | 2012 | 2 tubes, part of Longyan–Xiamen Railway |
| Railway | Terfnertunnel | Tyrol, Austria | 15,840 m (9.843 mi) | 2012 | |
| Former railway | Henderson Tunnel[69][70] | Front Range, United States | 15,800 m (9.818 mi) | 1976 | Narrow gauge railway, replaced by a conveyor belt in 1999. Only one portal (served an underground mine)[71] |
| Metro | Istanbul Metro (Line M9) | Istanbul, Turkey | 15,800 m (9.818 mi) | 2013–2024 | |
| Water supply | Pandaoling Tunnel, Datong River Diversion to Shaanxi Project | Shaanxi, China | 15,723 m (9.770 mi) | 1994 | |
| Metro | Copenhagen Metro: City Circle Line | Denmark | 15,500 m (9.631 mi) | 2019 | Longest railway tunnel in Denmark and Scandinavia |
| Metro | Budapest Metro: Line 3[72] | Hungary | 15,500 m (9.631 mi) | 1976–1990 | Line 3 is actually 17.39 km long, but only 15.5 km of it is underground. |
| Railway Single Track | Furka Base | Urner Alps, Switzerland | 15,442 m (9.595 mi) | 1982 | Single track with passing loops, metre gauge |
| Railway Twin Tube | Ceneri Base Tunnel | Lepontine Alps, Switzerland | 15,400 m (9.569 mi) | 2020 | Part of the NRLA |
| Metro | Seoul Subway: Line 3 (Gupabal–Geumho) | Seoul, South Korea | 15,400 m (9.569 mi) | 1985 | |
| Metro | Tianjin Subway: Line 1 | Tianjin, China | 15,378 m (9.555 mi) | 1976–2006 | |
| Railway | Haruna | Gunma Prefecture, Japan | 15,350 m (9.538 mi) | 1982 | |
| Railway Single Track | Severomuysky Tunnel | Severomuysky Range, Russia (construction started at the time of Soviet Union) | 15,343 m (9.534 mi) | 2003 | |
| Wastewater | Deer Island Outfall Tunnel[73] | Deer Island, Boston, Massachusetts, United States | 15,290 m (9.501 mi) | 2000 | 24 ft (7.3 m) diameter (42m2 cross section); discharges treated effluent into Atlantic Ocean |
| Railway Single Tube | Firenzuola | Bologna – Firenze, Italy | 15,285 m (9.498 mi) | 2009 | Bologna–Florence high-speed railway |
| Hydroelectric | Inguri Hydroelectric Power Station Water Tunnel | Georgia (at the time of construction Soviet Union) | 15,279 m (9.494 mi) | 1978 | |
| Metro | Shanghai Subway: Line 2 | Shanghai, China | 15,274 m (9.491 mi) | 2000 | Between Zhanjianggaoke station and Lingkong Station |
| Water supply | Jinquidi Tunnel, Niulan River Diversion to Dianchi | Yunnan, China | 15,257 m (9.480 mi) | 2013 | |
| Hydroelectric | Baotan Hydroelectric Power Station Water Tunnel | Guangxi, China | 15,200 m (9.445 mi) | 2010 | |
| Railway | Gorigamine Tunnel[65] | Takasaki – Nagano, Japan | 15,175 m (9.429 mi) | 1997 | |
| Hydroelectric | Xuecheng Hydroelectric Power Station Water Tunnel[74] | Sichuan, China | 15,174 m (9.429 mi) | 2007 | |
| Railway Single Track | Monte Santomarco | Paola – Cosenza, Italy | 15,040 m (9.345 mi) | 1987 | |
| Railway Single Tube | Gotthard Rail Tunnel | Lepontine Alps, Switzerland | 15,003 m (9.322 mi) | 1882 | Longest transit tunnel until Simplon Tunnel was opened. |
| Metro | Gwangju Metro: Line 1 (Sotae station–Dosan station) | Gwangju, South Korea | 15,000 m (9.321 mi) | 2004 | |
| Railway | Nakayama Tunnel | Gunma Prefecture, Japan | 14,857 m (9.232 mi) | 1982 | Jōetsu Shinkansen |
| Water supply | Dangara Irrigation Tunnel[75] | Nurek, Tajikistan (at the time of construction Soviet Union) | 14,800 m (9.196 mi) | 1987 | |
| Railway | Cuajone-El Sargento | Ilo-Toquepala / Cuajone Industrial Railroad – Southern Peru Copper Corporation, Peru | 14,724 m (9.149 mi)[76] | 1975 | |
| Railway Single Tube | Mount Macdonald Tunnel | Rogers Pass, Glacier National Park, Canada | 14,723 m (9.148 mi) | 1989 | |
| Railway (Maglev) | Misaka Sasago Tunnel | Yamanashi, Japan | 14,613 m (9.080 mi) | 1996 | Part of the Chuo Shinkansen (Maglev). Already used as Yamanashi Test Track since 1996. |
| Railway Single Tube | Lötschberg Tunnel | Bernese Alps, Switzerland | 14,612 m (9.079 mi) | 1913 | |
| Water supply | Caoe River Diversion Project | Zhejiang, China | 14,600 m (9.072 mi) | 2011 | |
| Railway Single Tube | Romerike Tunnel | Oslo – Lillestrøm, Norway | 14,580 m (9.060 mi) | 1999 | |
| Railway | Fajiushan Tunnel[77] | Shanxi, China | 14,573 m (9.055 mi) | 2014 | Part of Shanxi–Henan–Shandong railway. |
| Water supply | Snowy-Geehi Tunnel[44] | New South Wales, Australia | 14,500 m (9.010 mi) | 1966 | Part of the 145 km tunnel network of the Snowy Mountains Scheme |
| Metro | Seoul Subway: Line 4 (Isu–Beomgye) | Seoul, Gwacheon and Anyang in South Korea | 14,500 m (9.010 mi) | 1980–1994 | |
| Road | Zigana Tunnel | Torul–Maçka, Turkey | 14,481 m (8.998 mi)[78] | 2023[79] | Longest road tunnel in Turkey |
| Hydroelectric | Jisha Hydroelectric Power Station Water Tunnel | Yunnan, China | 14,467 m (8.989 mi) | 2007 | |
| Road Twin tube | Ryfylke Tunnel | Stavanger–Strand, Norway | 14,400 m (8.948 mi) | 2019 | Longest underwater road tunnel in the world |
| Water supply | #6 Tunnel, Yellow River Diversion to Shanxi South Line | Shanxi, China | 14,400 m (8.948 mi) | 2002 | See South–North Water Transfer Project |
| Water supply | Ala Mountain Pass Water Supply Project | Xinjiang, China | 14,346 m (8.914 mi) | 2010 | |
| Road Twin Tube | Ovit Tunnel[80] | Erzurum Province–Rize Province, Turkey | 14,346 m (8.914 mi) | 2018 | |
| Metro | Stockholm Metro: Tunnelbana 3 (Blue Line) Kungsträdgården–Hjulsta | Stockholm, Sweden | 14,300 m (8.886 mi) | 1975–1977 | |
| Railway Single Tube | Dayaoshan Tunnel[81] | Nanling Mountains, China | 14,294 m (8.882 mi) | 1987 | |
| Metro | Istanbul Metro (Line M8) | Istanbul, Turkey | 14,270 m (8.867 mi) | 2023[82] | |
| Hydroelectric | Zaramag Hydroelectric Power Station Water Tunnel[83][84] | Ardon River, North Ossetia, Russia | 14,226 m (8.840 mi) | 2015[85] | |
| Water supply | Tooma-Tumut Tunnel[44] | New South Wales, Australia | 14,200 m (8.823 mi) | 1961 | Part of the 145 km tunnel network of the Snowy Mountains Scheme |
| Metro | Metro Lisbon – Blue (Seagull) Line | Lisbon, Portugal | 14,000 m (8.699 mi) | 1959–2007 | |
| Metro | MTR – Island line (West of Heng Fa Chuen) | Hong Kong, China (construction started at the time of British Hong Kong) | 14,000 m (8.699 mi) | 1985–2014 | |
| Road | Arlberg Road Tunnel | Arlberg, Austria | 13,972 m (8.682 mi) | 1978 | |
| Water supply | Shanggongshan Tunnel, Zhangjiuhe Water Supply Project | Yunnan, China | 13,941 m (8.663 mi) | 2007 | |
| Hydroelectric | Dayingshan #4 Hydroelectric Power Station Water Tunnel | Yunnan, China | 13,932 m (8.657 mi) | 2009 | 8.5 m in diameter (57m2 cross section) |
| Railway | Hokuriku Tunnel | Fukui Prefecture, Japan | 13,870 m (8.618 mi) | 1962 | Hokuriku Main Line |
| Railway Single Tube | Xiapu Tunnel | Fujian, China | 13,838 m (8.599 mi) | 2009 | |
| Railway Twin Tube | Yesanguan Tunnel | Hubei, China | 13,838 m (8.599 mi) | 2010 | Tube I: 13838 meters, tube II: 13796 meters |
| Hydroelectric | Centrala Hidroelectrică Lotru-Ciunget | Ciungetu, Romania | 13,719 m (8.525 mi) | 1972 | 5 m in diameter |
| Railway Single Tube | Fréjus (Mont Cenis) | Alps, France/Italy (construction started in the Kingdom of Sardinia) | 13,657 m (8.486 mi) | 1871 | Longest transit tunnel until Gotthard Tunnel was opened. |
| Road Twin Tube | Xishan Tunnel | Shanxi, China | 13,654 m (8.484 mi) | 2012 | Left tube: 13654 meters, right tube: 13570 meters |
| Railway Single Tube | North Tianshan Tunnel | Xinjiang, China | 13,610 m (8.457 mi) | 2009 | |
| Railway | Marmaray | Istanbul, Turkey | 13,600 m (8.451 mi) | 2013 | Built next to a fault zone, between two continents |
| Railway Single Track | Savio Rail Tunnel | Helsinki – Kerava, Finland | 13,575 m (8.435 mi) | 2008 | |
| Metro | Busan Metro: Line 3 (Suyeong–Deokcheon) | Busan, South Korea | 13,500 m (8.389 mi) | 2005 | |
| Railway Twin Tube | Shin Shimizu Tunnel[65] | Mount Tanigawa, Japan | 13,500 m (8.389 mi) | 1967 | |
| Road | Mount Erlang Tunnel | Sichuan, China | 13,433 m (8.347 mi) | 2018 | Erlangshan extra-long tunnel part of Yakang Expressway |
| Railway Single Track | Hex River Tunnel[86] | Hex River Pass, South Africa | 13,400 m (8.326 mi) | 1989 | |
| Railway | Wonhyo Tunnel[87][88] | Ulsan, South Korea | 13,270 m (8.246 mi) | 2010 | Gyeongbu high-speed railway |
| Railway Single Tube | Dabieshan Tunnel | Hubei, China | 13,256 m (8.237 mi) | 2008 | |
| Railway | Schlern Tunnel[89] | South Tyrol, Italy | 13,159 m (8.177 mi) | 1993 | |
| Railway Single Tube | Caponero-Capoverde | Genova – Ventimiglia, Italy | 13,135 m (8.162 mi) | 2001 | Includes an underground station ("San Remo") |
| Road Twin Tube | Hongtiguan Tunnel | Shanxi, China | 13,122 m (8.154 mi) | 2013 | Left tube: 13122 meters, right tube: 13098 meters |
| Metro | Barcelona Metro line 2 | Barcelona, Spain | 13,100 m (8.140 mi) | 1985–1997 | |
| Railway | Aki Tunnel | San'yō Shinkansen, Japan | 13,030 m (8.096 mi) | 1975 | |
| Many more tunnels exist that are shorter than 13,000 metres (8 mi) | |||||
World's longest tunnels (under construction) edit
| Type | Name | Location | Length | Year | Comment |
|---|---|---|---|---|---|
| Water Supply | Kashuang Water Tunnel | Xinjiang, China | 280,000 m (173.984 mi) | (??) | Water transfer from the snow melt of Altai Mountains to the arid region of Xinjiang[90] |
| Water Supply | New York City Water Tunnel No. 3 | New York State, United States | 96,560 m (60.000 mi) | 2026[91] | More water supply for New York City. Partially in use. |
| Metro | Paris Métro Line 15 | Paris/Île-de-France, France | 75,000 m (46.603 mi) | 2025–2030 | Circular line; will form the longest subway tunnel. |
| Railway Twin Tube | Mont d'Ambin Base Tunnel | Cottian Alps, France/Italy | 57,500 m (35.729 mi) | 2032[92] | Part of the Lyon–Turin high-speed railway. Reconnaissance tunnels under construction since 2002; construction of main tunnel started in 2016.[93] |
| Railway Twin Tube | Brenner Base Tunnel | Stubai Alps, Austria/Italy | 55,000 m (34.175 mi) | 2032[94] | Construction started in March 2015. Together with the already constructed Inntal Tunnel it will form the world's longest continuous railway tunnel with 64 km.[95][96] |
| Metro | Thomson-East Coast Line | MRT, Singapore | 43,000 m (26.719 mi) | 2024 | Excluding planned extension |
| Railway | Yigong tunnel | Tibet, China | 42,500 m (26.408 mi)[97] | 2030 | Part of the Sichuan–Tibet railway. Construction started in November 2020.[98] |
| Metro | Athens Metro Line 4 | Athens, Greece | 38,200 m (23.736 mi)[99] | 2029 | Construction of 1st phase started in June 2021,[100] total length may be changed. |
| Railway | Sejila tunnel | Tibet, China | 37,900 m (23.550 mi)[101] | 2030 | Part of the Sichuan–Tibet railway. Construction started in November 2020.[102][non-primary source needed] |
| Railway (Maglev) | Daiichi Shutoken Tunnel[citation needed] | Tokyo, Japan | 36,924 m (22.944 mi)[citation needed] | After 2027 | Part of the Chuo Shinkansen (Maglev) |
| Mineral transportation | Woodsmith Mine Tunnel Potash Project Mineral Transport System (MTS) | North York Moors, United Kingdom | 36,700 m (22.804 mi)[103] | (??)[104] | 6 m in diameter[105] incorporating conveyor and maintenance access. Start of construction was planned for 2016, but actually started in April 2019.[106][107] |
| Railway | Gaoligongshan Tunnel | Yunnan, China | 34,538 m (21.461 mi) | 2025[108] | Railway between Dali and Ruili. Construction started in August 2017.[109] |
| Railway (Maglev) | Daiichi Chukyoken Tunnel[citation needed] | Nagoya, Japan | 34,210 m (21.257 mi)[citation needed] | After 2027 | Part of the Chuo Shinkansen (Maglev) |
| Metro | L9 | Barcelona, Spain | 33,000 m (20.505 mi) | (??) (2009–2016 partial completion) | Excluding branches. Northern section of the line is in operation since 2009-12-13. Southern section of the line is in operation since 2016-02-12. Future of central section is unclear. |
| Railway Twin Tube | Koralm Tunnel | Koralpe, Austria | 32,900 m (20.443 mi) | 2026[110] | Part of the Koralm Railway; boring of main tunnel started at the west portal in May 2010.[111] |
| Railway | Oshima Tunnel | Hokkaido, Japan | 32,675 m (20.303 mi) | 2031 | Part of the Hokkaido Shinkansen. |
| Metro | Cross Island Line | MRT, Singapore | 29,000 m (18 mi)[112] (Phase 1 only) | 2030 (Phase 1) 2032 (Phase 2) | Construction of Phase 1 started in January 2023[113] |
| Water Supply | NCP Canal Main Tunnel | Anuradhapura East, Sri Lanka | 27,800 m (17.274 mi) | 2025 | Part of North Central Province Canal under Mahaweli Development programme. Low slope tunnel with gravity flow, 8m in diameter. Supplies water from Moragahakanda Reservoir to North Central and Northern Provinces.[114] |
| Railway Twin Tube | Valico Tunnel | Ligurian Apennines, Italy | 27,342 m (16.990 mi)[115] | 2026 | Breakthrough in September 2020.[116] Part of the Tortona–Genoa high-speed railway. |
| Railway Twin Tube | Semmering Base Tunnel | Lower Austria/Styria, Austria | 27,300 m (16.963 mi) | 2030[117] | Construction of the first contract section started in January 2014.[118] Will cut travel time between Vienna and Graz by 30 minutes and is part of the Baltic–Adriatic Corridor |
| Road | Rogfast tunnel | Randaberg–Bokn, Norway | 26,700 m (16.591 mi) | 2033[119] | Construction started in January 2018, halted October 2019 due to expected cost overruns, revised plan and 48% cost increase approved November 2020; construction restarted late 2021.[120] Will be the longest road tunnel in the world, and also the deepest undersea tunnel, 392 metres (1,286 ft) below sea level. It will also have a 4,100 m (2.548 mi) connection tunnel from Kvitsøy to the main tunnel. |
| Railway | Sasson Tunnel[citation needed] | Hokkaido, Japan | 26,230 m (16.299 mi)[citation needed] | 2031 | Part of the Hokkaido Shinkansen. |
| Metro | Suburban Rail Loop East | Melbourne, Victoria, Australia | 26,000 m (16 mi)[a] | 2035[121] | Construction started in June 2022.[122] SRL North is still under early planning, projected to be completed by 2053. |
| Water Supply | Mae Taeng–Mae Ngat Tunnel[123] | Chiang Mai, Thailand | 25,624 m (15.922 mi) | (??)[124] | 4 m in diameter. This tunnel is a part of "Mae Taeng–Mae Ngat–Mae Kuang Diversion Tunnel Project" |
| Railway (Maglev) | Minami Alps Tunnel[citation needed] | Akaishi Mountains, Japan | 25,019 m (15.546 mi)[citation needed] | After 2027 | Part of the Chuo Shinkansen (Maglev) |
| Railway (Maglev) | Chuo Alps Tunnel[citation needed] | Kiso Mountains, Japan | 23,288 m (14.470 mi)[citation needed] | After 2027 | Part of the Chuo Shinkansen (Maglev) |
| Metro | Metro Manila Subway | Metro Manila, Philippines | 23,160 m (14.391 mi) | 2028 | Only for the dedicated mainline between East Valenzuela and FTI.[125] To be partially opened in 2025.[126] |
| Road Twin Tube | Sengli Daban Tunnel | Xinjiang, China | 22,035 m (13.692 mi) | 2026[127] | Construction started in 2020. It bypasses Sengli Daban mountain pass which sits up at 4091 meters above the sea level. Once completed, it will become the longest road tunnel in the world at an altitude of over 4000m. |
| Railway | Thane Creek Tunnel[128] | Mumbai, India | 21,150 m (13.142 mi)[129] | 2028[130] | Part of the Mumbai–Ahmedabad high speed railway, construction started in November 2023,[131] 13 m diameter.[132] |
| Railway | Shin Hokuriku Tunnel[citation needed] | Fukui, Japan | 19,760 m (12.278 mi)[citation needed] | 2024[citation needed] | Part of the Hokuriku Shinkansen |
| Railway Twin tube | Bentong Tunnel (Genting Tunnel) | Bentong, Pahang, Malaysia | 18,000 m (11.185 mi) | 2027 | Part of MRL East Coast Rail Link project. Will became the longest tunnel in South East Asia[133] |
| Railway | Shiribeshi Tunnel[citation needed] | Hokkaido, Japan | 17,975 m (11.169 mi)[citation needed] | 2031 | Part of the Hokkaido Shinkansen. |
| Road and railway | Fehmarn Belt Fixed Link | Fehmarn Belt, Germany/Denmark | 17,600 m (10.936 mi) | 2029[134] | Construction started in January 2021[135] |
| Railway | Tateiwa Tunnel[citation needed] | Hokkaido, Japan | 16,980 m (10.551 mi)[citation needed] | 2031 | Part of the Hokkaido Shinkansen. |
| Road | Förbifart Stockholm[136] | Stockholm, Sweden | 16,500 m (10.253 mi) | 2030[137] | Construction started in August 2014 |
| Road | Tokyo Gaikan Tunnel[citation needed] | Tokyo, Japan | 16,200 m (10.066 mi)[citation needed] | 2030[citation needed] | Part of the C3 Tokyo Gaikan Expressway. |
| Railway | Zhoushan underwater tunnel | Zhejiang, China | 16,200 m (10.066 mi)[138] | 2026[138] | Part of the Ningbo–Zhoushan railway. Construction started in December 2020.[139] |
| Railway Twin Tube | Chiltern tunnel | Chiltern Hills, United Kingdom | 16,040 m (9.967 mi) | 2029-2033[140] | Part of High Speed 2,[141] construction started in May 2021,[142] 9.1 m internal diameter[143] |
| Railway | Uchiura Tunnel[citation needed] | Hokkaido, Japan | 15,560 m (9.669 mi)[citation needed] | 2031 | Part of the Hokkaido Shinkansen. |
| Railway (Maglev) | Ina Sanchi Tunnel[citation needed] | Nagano, Japan | 15,300 m (9.507 mi)[citation needed] | After 2027 | Part of the Chuo Shinkansen (Maglev) |
| Railway | Devprayag Rail Tunnel[citation needed] | Uttarakhand, India | 15,270 m (9.488 mi) [citation needed] | 2024–2025[citation needed] | Part of Rishikesh–Karnaprayag line[144] |
| Railway (Maglev) | Hiyoshi Tunnel[citation needed] | Gifu, Japan | 14,532 m (9.030 mi)[citation needed] | After 2027 | Part of the Chuo Shinkansen (Maglev) |
| Road | Zoji-la Tunnel | Zoji La Pass, India | 14,200 m (8.823 mi)[145] | 2026 | Construction started in October 2020[146] |
| Railway | Patalpani Rail Tunnel[citation needed] | Madhya Pradesh, India | 14,000 m (8.699 mi)[citation needed] | 2025[citation needed] | |
| Metro | MRT Orange Line[147] | Bangkok, Thailand | 13,770 m (8.556 mi) | 2025 | Orange Line Phase 1 |
| Railway Twin Tube | Northolt tunnel | West London, United Kingdom | 13,500 m (8.389 mi) | 2029-2033[140] | Part of High Speed 2, construction started in October 2022.[148] |
| Metro | İzmir Metro Line M2 | İzmir, Turkey | 13,500 m (8.389 mi)[149] | 2026 | |
| Metro | Istanbul Metro (Line M12) | Istanbul, Turkey | 13,030 m (8.096 mi) | 2025 |
World's longest tunnels (advanced planning stage) edit
| Type | Name | Location | Length | Year | Comment |
|---|---|---|---|---|---|
| Water supply | Tibet Xinjiang Tunnel | Tibet/Xinjiang, China | 1,000,000 m (621.4 mi) | ??? | China preparing world's longest tunnel to divert Tibet river to desert[150] |
| Railway | Bohai Strait tunnel | Bohai Strait, China | 123,000 m (76.4 mi) | ??? | Tunnel between Dalian on the Liaodong Peninsula and Yantai on the Shandong Peninsula. |
| Railway | Talsinki | 100,000 m (62.1 mi) | After 2030 | Awaiting financing | |
| Water supply | Qinling Tunnel, Han River Diversion to Wei River[citation needed] | Shaanxi, China | 98,300 m (61.1 mi)[citation needed] | ??? | |
| Railway | Serra do Mar Tunnel[151] | Brazil, between São Paulo and Santos | 30,000 m (18.6 mi) | ??? | |
| Railway Twin Tube | Tachlovice Tunnel | Prague/Beroun, Czech Republic | 24,700 m (15.3 mi)[152] | After 2035 | Project is on hold |
| Metro | İzmir Metro Line M3 | İzmir, Turkey | 22,300 m (13.857 mi) | 2020s | |
| Metro | Istanbul Metro (Line M13) | Istanbul, Turkey | 21,900 m (13.6 mi) | 2020s | |
| Railway and electricity | Grimsel Tunnel | Grimsel Pass, Switzerland | 21,720 m (13.5 mi)[153] | 2025/2026 | Feasibility study |
| Railway Twin tube | Pacheco Pass Tunnels | Pacheco Pass, California, United States | 21,000 m (13.0 mi) | 2031 | To be built as part of the California High-Speed Rail project |
| Road Twin tube | Gohpur – Numaligarh Tunnel | Assam, India | 15,600 m (9.693 mi)[154] | ??? | Tunnel under the Brahmaputra River |
| Road Twin tube | Kresna Gorge Tunnel[155] | Kresna, Bulgaria | 15,400 m (9.6 mi) | Cancelled | Part of Struma motorway, connecting Sofia and Athens. |
| Road Twin tube | Agua Negra Tunnel | Agua Negra Pass, Argentina/Chile | 14,000 m (8.7 mi) | ??? | Awaiting ratification by Chile[citation needed] |
World's longest tunnels (abandoned) edit
| Type | Name | Location | Length | Year | Comment |
|---|---|---|---|---|---|
| Water supply | Gadara Aqueduct | Roman Empire | 94,000 m (58.4 mi) | 129– | Water supply for the Decapolis in present-day Jordan |
World's longest tunnels (proposed) edit
See also edit
Wikimedia Commons has media related to Tunnel.
- List of long tunnels by type – contains separate tables for railroad, subway, vehicular, bicycle, water/aqueducts, and also for different building techniques
- List of deepest caves
- List of deepest mines
- Lists of tunnels
- List of longest railway tunnels
- List of longest subway tunnel sections
- List of longest bridges
Notes edit
- ^ Length does not include SRL North or West.
References edit
- ^ "Dahuofang Water Tunnel | The Robbins Company". Robbinstbm.com. from the original on 22 March 2012. Retrieved 1 February 2016.
- ^ "Tras 11 años de construcción, inauguran el Túnel Emisor Oriente". 23 December 2019. from the original on 21 January 2022. Retrieved 22 January 2022.
- ^ "Не 70 км, а 57,5! Как московские власти «удлинили» Большую кольцевую линию метро". 22 March 2023. from the original on 27 March 2023. Retrieved 25 July 2023.
- ^ "IMG 20230327 063939 969 — Postimages". from the original on 27 March 2023. Retrieved 25 July 2023.
- ^ First stretch opens in 1969 as part of line 2
- ^ "Project data – raw construction Gotthard Base Tunnel" (PDF). Lucerne, Switzerland: AlpTransit Gotthard Ltd. 1 June 2016. (PDF) from the original on 11 March 2016. Retrieved 15 December 2016.
- ^ "Wer hat die grösste Röhre?" [Who has the longest tube?]. Tages-Anzeiger (graphical animation) (in German). Zurich, Switzerland. 14 April 2016. from the original on 29 April 2016. Retrieved 11 May 2016.
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list, longest, tunnels, this, list, longest, tunnels, ranks, tunnels, that, least, long, only, continuous, tunnels, included, pipelines, even, those, that, buried, excluded, longest, tunnels, have, been, constructed, water, distribution, followed, tunnels, rai. This list of longest tunnels ranks tunnels that are at least 13 km 8 1 mi long Only continuous tunnels are included Pipelines even those that are buried are excluded The longest tunnels have been constructed for water distribution followed by tunnels for railways The southwest portal of the Laerdal Tunnel in Norway the world s longest road tunnel Contents 1 World s longest tunnels in use 2 World s longest tunnels under construction 3 World s longest tunnels advanced planning stage 4 World s longest tunnels abandoned 5 World s longest tunnels proposed 6 See also 7 Notes 8 ReferencesWorld s longest tunnels in use editType Name Location Length Year CommentWater supply Delaware Aqueduct nbsp New York State United States 137 000 m 85 128 mi 1945 4 1 m in diameter 13 2 m2 New York City s main water supply tunnel Water supply Paijanne Water Tunnel nbsp Southern Finland Finland 120 000 m 74 565 mi 1982 16 m2 cross section Main water supply tunnel for southern Finland including Helsinki drilled through solid rock Metro Suzhou Rail Transit Line 3 11 nbsp Suzhou China 86 542 m 53 775 mi 2019 2023 Suzhou Rail Transit Line 11 and Line 3 are connected at Weiting station with through trains passing by Longest metro tunnelWater supply Dahuofang Water Tunnel nbsp Liaoning China 85 320 m 53 015 mi 2009 8 m in diameter 1 50 m2 cross section Water supply Orange Fish River Tunnel nbsp South Africa 82 800 m 51 450 mi 1972 Longest continuous enclosed aqueduct in the Southern Hemisphere 22 5 m2 cross section Built to divert water from the Orange River to the Great Fish River Water supply Bolmen Water Tunnel nbsp Kronoberg Scania Sweden 82 000 m 50 952 mi 1987 8 m2 cross sectionMetro Chengdu Metro Line 6 nbsp Chengdu China 68 223 m 42 392 mi 2020 Longest independent single line metro rapid transit tunnelHydroelectric Neelum Jhelum Hydropower Tunnel nbsp Muzaffarabad Azad Kashmir Pakistan 68 000 m 42 253 mi 2017 Part of the 969 MW Neelum Jhelum Hydropower PlantWastewater Tunel Emisor Oriente nbsp Mexico City Mexico 62 500 m 38 836 mi 2019 2 7 m in diameter Longest wastewater tunnel Metro Qingdao Metro Line 1 nbsp Qingdao China 59 818 m 37 169 mi 2020 2021 Second longest metro rapid transit tunnelMetro Guangzhou Metro Line 18 nbsp Guangzhou China 58 300 m 36 226 mi 2021Metro Guangzhou Metro Line 3 nbsp Guangzhou China 57 930 m 35 996 mi Excl branch 2005 2018Metro Moscow Metro Bolshaya Koltsevaya line nbsp Moscow Russia 57 538 m 35 752 mi 3 4 Excl branch 2018 2023 5 Longest metro rapid transit circular lineRailway Twin Tube Gotthard Base Tunnel nbsp Central Swiss Alps Switzerland 57 104 m 35 483 mi and 57 017 m 35 429 mi 2016 Longest conventional railway tunnel It is also the world s longest transit tunnel by geodetic distance 55 782 km 34 661 mi between the two portals Total 151 84 km 94 35 mi of broken out tunnels through solid rocks 6 7 Part of the NRLA Metro Beijing Subway Line 10 nbsp Beijing China 57 100 m 35 480 mi 2008 2013Railway Single Tube Seikan Tunnel nbsp Tsugaru Strait Japan 53 850 m 33 461 mi 1988 74 m2 longest railway tunnel until 2016 Longest tunnel with an undersea section running between Honshu and Hokkaido Undersea section measures 23 3 kilometres 14 5 mi Metro Beijing Subway Line 6 nbsp Beijing China 53 400 m 33 181 mi 2012 2018Water supply Zelivka Water Tunnel 8 nbsp Central Bohemian Region Czech Republic 51 970 m 32 293 mi 1972 9 12 m2Metro Seoul Subway Line 5 nbsp Seoul South Korea 51 700 m 32 125 mi longest branch 1995 2021 Longest metro rapid transit tunnel until Guangzhou Metro Line 3 extension opened in 2010 crosses west to east under the Seoul Capital Area Metro Istanbul Metro Line M11 nbsp Istanbul Turkey 51 500 m 32 001 mi 2023 2024 Longest tunnel in TurkeyDewatering Adit Rothschonberger Stolln 9 nbsp Freiberg Mining Field Germany 50 900 m 31 628 mi 1844 1882 6 m2 cross section longest tunnel until 1945 Part of a UNESCO World Heritage Site Railway Twin Tube Channel Tunnel nbsp nbsp English Channel United Kingdom France 50 450 m 31 348 mi 1994 Second longest railway tunnel until 2016 Longest underwater section longest international tunnel 2 45 m2 1 18 m2 running between Folkestone Kent and Coquelles Pas de Calais Railway Single Tube Yulhyeon Tunnel nbsp Seoul Capital Area South Korea 50 300 m 31 255 mi 10 2016 11 107 m2 part of the Suseo high speed railway Water supply River Arpa Lake Sevan tunnel 12 13 nbsp Armenia at the time of construction nbsp Soviet Union 48 358 m 30 048 mi 14 1981 Longest tunnel built to restore ecological balance Transfers water from the Arpa to Lake Sevan to recover its level 15 Water supply Pahang Selangor Raw Water Transfer Project 16 17 nbsp Pahang amp Selangor Malaysia 44 600 m 27 713 mi 2014 5 2 m in diameterMetro Wuhan Metro Line 2 nbsp Wuhan China 44 347 m 27 556 mi 2012 2019Metro Shanghai Subway Line 7 nbsp Shanghai China 44 200 m 27 465 mi 2009 2010Water supply 1 Tunnel Yellow River Diversion to Shanxi North Line nbsp Shanxi China 43 670 m 27 135 mi 2011 See South North Water Transfer ProjectWater supply 7 Tunnel Yellow River Diversion to Shanxi South Line nbsp Shanxi China 43 500 m 27 030 mi 2002 See South North Water Transfer ProjectMetro Beijing Subway Line 8 nbsp Beijing China 42 600 m 26 470 mi 2012 2021Metro Shanghai Metro Line 15 nbsp Shanghai China 42 300 m 26 284 mi 2021Metro Chengdu Metro Line 5 nbsp Chengdu China 42 300 m 26 284 mi 2019Metro Beijing Subway Line 14 nbsp Beijing China 42 000 m 26 098 mi 2015 2021Metro Tianjin Metro Line 6 nbsp Tianjin China 42 000 m 26 098 mi 2016 2021Metro Downtown line nbsp MRT Singapore 41 900 m 26 035 mi 18 19 2013 2017 Longest rapid transit line in South East AsiaMetro Nanjing Metro Line 3 nbsp Nanjing China 41 567 m 25 829 mi 2011 2015 From Xinghuolu station to Mozhoudonglu station Metro Suzhou Rail Transit Line 4 nbsp Suzhou China 41 500 m 25 787 mi 2017Metro Serpukhovsko Timiryazevskaya Line Altufyevo Bulvar Dmitriya Donskogo nbsp Moscow Metro Russia construction started at the time of nbsp Soviet Union 41 470 m 25 768 mi 1983 2002Metro Madrid Metro Line 12 MetroSur nbsp Madrid Spain 40 900 m 25 414 mi 1999 2003Metro Tocho mae Shiodome Hikarigaoka Toei Oedo Line nbsp Tokyo Japan 40 700 m 25 290 mi 1991 2000 Tokyo Metropolitan Bureau of TransportationHydroelectric Karahnjukar Hydropower Plant nbsp Fljotsdalshreppur Iceland 39 700 m 24 668 mi 2003 2007 7 2 7 6 meters in diameter 45 m2 cross section Part of a wider complex of tunnels that are 72 kilometers in length combined Water supply Quabbin Aqueduct nbsp Massachusetts United States 39 600 m 24 606 mi 1933Metro Chengdu Metro Line 4 nbsp Chengdu China 39 300 m 24 420 mi 2015 2017Metro Chengdu Metro Line 7 nbsp Chengdu China 38 600 m 23 985 mi 2017Metro Seoul Subway Line 3 Apgujeong Ogeum nbsp Seoul South Korea 38 200 m 23 736 mi 1985 2010Metro Kaluzhsko Rizhskaya Line Novoyasenevskaya Medvedkovo nbsp Moscow Metro Russia at the time of construction nbsp Soviet Union 37 800 m 23 488 mi 1958 1990 Longest railway tunnel 1978 1984 and from November 1987 till March 1988 longest metro rapid transit tunnel 1990 1995Metro Shenzhen Subway Luobao Line nbsp Shenzhen China 37 497 m 23 300 mi 2009 2011Metro Chengdu Metro Line 1 nbsp Chengdu China 37 470 m 23 283 mi Excl branch 2010 2018Water supply Harold D Roberts Tunnel 20 nbsp Colorado United States 37 464 m 23 279 mi 1962 Diverts water from the Colorado River watershed to the South Platte River watershed for use in the Denver metropolitan area Flows across Continental Divide 4 465 feet 1 361 m below the surface at its deepest point Metro Shenzhen Subway Shekou Line nbsp Shenzhen China 36 146 m 22 460 mi 2010 2011Water supply Dawushan Tunnel Niulan River Diversion to Dianchi nbsp Yunnan China 36 137 m 22 454 mi 2013Metro Circle line nbsp MRT Singapore 35 700 m 22 183 mi 2009 2012Metro Busan Metro Line 2 Dongwon Jangsan nbsp Busan South Korea 35 500 m 22 059 mi 1999 2009Railway Songshan Lake Tunnel 21 nbsp Dongguan China 35 391 m 21 991 mi 2016 Dongguan Huizhou intercity railway longest railway tunnel in ChinaMetro Seoul Subway Line 6 nbsp Seoul South Korea 35 100 m 21 810 mi 2001Metro Seoul Subway Line 7 Cheongdam Bupyeong gu Office nbsp Seoul Incheon Bucheon and Gwangmyeong in South Korea 35 100 m 21 810 mi 2000 2012Metro Tianjin Metro Line 5 nbsp Tianjin China 34 800 m 21 624 mi 2018 2021Railway Single Track Lotschberg Base Tunnel nbsp Bernese Alps Switzerland 34 577 m 21 485 mi 2007 Longest land railway tunnel until Gotthard Base Tunnel was opened two single track tubes along 12 km only single track along 22 km Part of the NRLA Metro Istanbul Metro Line M4 nbsp Istanbul Turkey 34 050 m 21 158 mi 2012Water supply Tyne Tees Tunnel nbsp England United Kingdom 34 000 m 21 127 mi 1983 and earlier Northumbrian water supply tunnel Metro Guangzhou Metro Line 8 nbsp Guangzhou China 33 900 m 21 064 mi 2010 2020Metro Lyublinsko Dmitrovskaya Line Zyablikovo Seligerskaya nbsp Moscow Metro Russia construction started at the time of nbsp Soviet Union 33 400 m 20 754 mi 1995 2018Metro Madrid Metro Line 7 nbsp Madrid Spain 32 919 m 20 455 mi 1974 2007Railway Twin Tube New Guanjiao Tunnel nbsp Qinghai China 32 645 m 20 285 mi 2014 22 Longest tunnel on the upgraded dual track Xining Golmud section of Qinghai Tibet Railway longest railway tunnel in China until 2016 3323 58 3380 97 meters above sea levelMetro Meijo Line Meikō Line nbsp Nagoya Municipal Subway Japan 32 400 m 20 132 mi 1965 2004Metro Guangzhou Metro Line 2 nbsp Guangzhou China 32 000 m 19 884 mi 2010Metro Rathaus Spandau Rudow U7 nbsp Berlin U Bahn Germany 31 800 m 19 760 mi 1924 1984Water supply Gerede Water Transmission Tunnel 23 nbsp Ankara Turkey 31 592 m 19 630 mi 2019 24 5 2 m in diameterMetro Seoul Subway Bundang Line Seoul Forest Jukjeon nbsp Seoul Seongnam and Yongin in South Korea 31 400 m 19 511 mi 1994 2012Metro Daegu Metro Line 2 nbsp Daegu and Gyeongsan in South Korea 31 400 m 19 511 mi 2005 2012Wastewater Milwaukee Metropolitan Sewerage District Deep Tunnel Phase 1 nbsp Milwaukee County Wisconsin United States 31 221 m 19 400 mi 1993 405 million gallons of combined sewage storage designed to prevent sewage overflow into Lake Michigan The largest of three phases totalling 521 million gallons of storage 25 Metro Beijing Subway Line 1 nbsp Beijing China 31 040 m 19 287 mi 1971 2000Metro Bucharest Metro Line M1 nbsp Bucharest Romania 31 010 m 19 269 mi 1979 1992 8 670 m shared with M3 line Nether less one continuous tunnel Metro Cote Vertu Montmorency Line 2 Orange nbsp Montreal Metro Canada 30 798 m 19 137 mi 1966 2007Metro Shanghai Subway Line 2 nbsp Shanghai China 30 187 m 18 757 mi 2000Metro Parnas Kupchino line 2 nbsp Saint Petersburg Metro Russia construction started at the time of nbsp Soviet Union 30 100 m 18 703 mi 1961 2006Metro Guangzhou Metro Line 5 nbsp Guangzhou China 29 900 m 18 579 mi 2009Water supply Shandaken Tunnel nbsp Catskill Mountains New York United States 29 780 m 18 504 mi 1924Metro Shanghai Subway Line 8 nbsp Shanghai China 29 650 m 18 424 mi 2007 2009Metro Prospekt Veteranov Devyatkino line 1 nbsp Saint Petersburg Metro Russia at the time of construction nbsp Soviet Union 29 600 m 18 393 mi 1955 1978Metro Shanghai Subway Line 10 nbsp Shanghai China 29 600 m 18 393 mi 2010Water supply Evinos Mornos Tunnel 26 27 nbsp Aetolia Acarnania Greece 29 400 m 18 268 mi 1995Metro Chengdu Metro Line 2 nbsp Chengdu China 29 000 m 18 020 mi 2012 2013 Only includes phases 1 and 2Water supply Hultman Aqueduct 28 nbsp Eastern Massachusetts United States 28 640 m 17 796 mi 1939 11 5 ft 3 5 m to 14 ft 4 3 m diameter 15m2 cross section offline for rehabilitationMetro Sydney Metro Northwest nbsp Sydney New South Wales Australia 28 500 m 17 709 mi 2019 The line incorporates the existing 13 km Epping to Chatswood rail link It forms part of the wider Sydney Metro project Railway Twin Tube Guadarrama Tunnel 29 nbsp Sierra de Guadarrama Spain 28 377 m 17 633 mi 2007Water supply MetroWest Water Supply Tunnel 30 nbsp Eastern Massachusetts United States 28 300 m 17 585 mi 2003 14 ft 4 3 m diameter 15m2 cross section Railway Twin Tube West Qinling Tunnel nbsp Gansu China 28 236 m 17 545 mi 2016 Chongqing Lanzhou railwayMetro Taipei Metro Blue Line nbsp Taipei Taiwan 28 200 m 17 523 mi 1999 2015Metro Beijing Subway Line 4 nbsp Beijing China 28 165 m 17 501 mi 2009 2010Metro Seoul Subway Line 9 Gimpo Airport Sports Complex nbsp Seoul South Korea 28 100 m 17 461 mi 2009 2015Railway Single Tube Taihang Tunnel 31 nbsp Taihang Mountains China 27 848 m 17 304 mi 2007 On Shijiazhuang Taiyuan high speed railwayMetro Morden East Finchley Northern line nbsp London Underground England United Kingdom 27 800 m 17 274 mi 1890 1940 Longest railway tunnel in UKMetro Shenyang Subway Line 1 nbsp Shenyang China 27 800 m 17 274 mi 2010Water supply Melamchi Water Tunnel 32 nbsp Melamchi to Kathmandu Nepal 27 000 m 16 777 mi 2021 33 See Melamchi Water Supply ProjectMetro Seoul Subway Incheon Line 1 Bakchon International Business District nbsp Incheon South Korea 27 000 m 16 777 mi 1999 2009Metro Dainichi Nagahara Tanimachi Line nbsp Osaka Metro Japan 26 900 m 16 715 mi 1967 1983Particle accelerator LEP Tunnel 34 nbsp nbsp CERN Switzerland France 26 659 m 16 565 mi 1988 breakthrough 11 3 15 9 m2 circular ring now used by Large Hadron ColliderRailway Single Tube Hakkōda Tunnel Tōhoku Shinkansen nbsp Hakkōda Mountains Japan 26 455 m 16 438 mi 2010 64 74 m2Water supply Sanliurfa Irrigation Tunnels nbsp Turkey 26 400 m 16 404 mi 2005 35 Metro Shanghai Subway Line 9 nbsp Shanghai China 26 263 m 16 319 mi 2007 2010Hydroelectric Gilgel Gibe II Power Station headrace tunnel nbsp Ethiopia 26 000 m 16 156 mi 2005 2009 Tunnel partially collapsed was repaired in 2010 36 37 Water supply 5 Tunnel Yellow River Diversion to Shanxi South Line nbsp Shanxi China 26 000 m 16 156 mi 2002 See South North Water Transfer ProjectMetro Daegu Metro Line 1 nbsp Daegu South Korea 25 900 m 16 094 mi 1997 2002Metro MRT Blue Line nbsp Bangkok Thailand 25 800 m 16 031 mi 2004 Second phase will be open in April 2019Railway Single Tube Iwate Ichinohe Tunnel nbsp Ōu Mountains Japan 25 810 m 16 038 mi 2002Water supply Sudbury Aqueduct nbsp Eastern Massachusetts United States 25 750 m 16 000 mi 1878 Emergency backup useMetro Suzhou Rail Transit Line 1 nbsp Suzhou China 25 739 m 15 993 mi 2007 2011Metro Line 3 Athens Metro 38 nbsp Athens Greece 25 200 m 15 659 mi 1992 2022 Line 3 is actually 46 5 km long but only 25 2 km of it are underground Metro Helsinki metro Kivenlahti Sornainen nbsp Espoo and Helsinki Finland 25 200 m 15 659 mi 1982 2022Metro Taipei Metro Orange Line Huilong Nanshijiao nbsp Taipei Taiwan 25 100 m 15 596 mi Excl branch 1998 2013Railway Twin Tube Musil Tunnel 39 40 nbsp Wonju Jecheon Jungang Line South Korea 25 080 m 15 584 mi 2021 41 Railway Twin Tube Pajares Base Tunnel nbsp Asturias Leon Spain 24 667 m 15 327 mi 2023Road Laerdal Tunnel nbsp Laerdal Aurland Norway 24 510 m 15 230 mi 2000 The longest road tunnel in the worldMetro Yellow Line Delhi Metro GTB Nagar Qutub Minar 42 nbsp Delhi India 24 000 m 14 913 mi 2004 2010 Longest tunnel in IndiaMetro Madrid Metro Line 1 nbsp Madrid Spain 23 876 m 14 836 mi 1919 2007Railway Lainzer Wienerwaldtunnel nbsp west of Vienna Austria 23 844 m 14 816 mi 2012 Breakthrough 2007Wastewater Harbour Area Treatment Scheme HATS Stage 1 43 nbsp Hong Kong China construction started in nbsp British Hong Kong 23 600 m 14 664 mi 2001Water supply Eucumbene Snowy Tunnel 44 45 nbsp New South Wales Australia 23 500 m 14 602 mi 1965 Part of the 145 km tunnel network of the Snowy Mountains SchemeRailway South Luliangshan Tunnel 46 nbsp Shanxi China 23 473 m 14 585 mi 2014 47 2 tubes part of Shanxi Henan Shandong railwayMetro Madrid Metro Line 6 nbsp Madrid Spain 23 472 m 14 585 mi 1979 2007Metro Angrignon Honore Beaugrand Line 1 Green nbsp Montreal Metro Canada 23 262 m 14 454 mi 1966 2007Metro Warsaw Metro Line 1 Kabaty Mlociny nbsp Warsaw Poland 23 100 m 14 354 mi 1983 2008Metro Beijing Subway Line 2 nbsp Beijing China 23 100 m 14 354 mi 1969 1987Hydroelectric Xinma Hydroelectric Power Station Water Tunnel nbsp Sichuan China 22 975 m 14 276 mi 2009Railway Iiyama Tunnel 48 nbsp Iiyama Japan 22 225 m 13 810 mi 2015Railway Daishimizu Tunnel nbsp Mount Tanigawa Japan 22 221 m 13 807 mi 1982 Longest railway tunnel until Seikan Tunnel was opened Water supply Eucumbene Tumut Tunnel 44 nbsp New South Wales Australia 22 200 m 13 794 mi 1959 Part of the 145 km tunnel network of the Snowy Mountains SchemeRoad WestConnex nbsp Sydney New South Wales Australia 21 800 m 13 546 mi 2023 2019 2020 partial completion New M4 Tunnels opened 2019 WestConnex M8 opened 2020Railway Daegwallyeong Tunnel nbsp Pyeongchang Gangneung Gyeonggang Line South Korea 21 755 m 13 518 mi 2017 49 Water supply Vorotan Arpa Tunnel 50 nbsp Armenia construction started at the time of nbsp Soviet Union 21 652 m 13 454 mi 2004Particle accelerator incomplete UNK proton accelerator nbsp Protvino Russia construction started at the time of nbsp Soviet Union 21 000 m 13 049 mi 1994 breakthrough Construction stopped after finishing of main circle tunnel future is unclearMetro Guangfo Metro nbsp Foshan China 20 900 m 12 987 mi 2010Railway Twin Tube Luliangshan Tunnel nbsp Shanxi China 20 785 m 12 915 mi 2011 2 tubes left tube is 20785 meters right tube is 20738 metersMetro Shanghai Subway Line 4 nbsp Shanghai China 20 740 m 12 887 mi 2005 2007Metro Barcelona Metro Line 1 nbsp Barcelona Spain 20 700 m 12 862 mi 1926 1992Hydroelectric Ward Tunnel citation needed nbsp California United States 20 610 m 12 806 mi 1920 1925 Part of the Big Creek Hydroelectric Project of the Southern California Edison Company Excavated through solid granite Metro Busan Metro Line 1 Hadan Busan Nat l Univ of Education nbsp Busan South Korea 20 600 m 12 800 mi 1985 1994Metro Xian Subway Line 2 nbsp Xi an China 20 500 m 12 738 mi 2011Metro Daejeon Metro Line 1 nbsp Daejeon South Korea 20 470 m 12 719 mi 2006 2007Metro Nanjing Metro Line 2 nbsp Nanjing China 20 380 m 12 664 mi 2010Metro Shanghai Subway Line 6 nbsp Shanghai China 20 336 m 12 636 mi 2007Railway Geumjeong Tunnel 51 nbsp Busan South Korea 20 323 m 12 628 mi 2010 Gyeongbu high speed railwayRailway Twin Tube Wushaoling Tunnel nbsp Wuwei China 20 060 m 12 465 mi 2006 2007 2 tubes left tube is 20060 meters right tube is 20050 metersMetro Istanbul Metro Line M5 nbsp Istanbul Turkey 20 000 m 12 427 mi 2017 2018 M5 line Uskudar Cekmekoy is 20 km with depot line Line is 30 9 km with Cekmekoy Sultanbeyli Phase Electric power transmission tunnel The London Connection 52 nbsp London England United Kingdom 20 000 m 12 427 mi 2005 53 National Grid plc 3 metre diameter 400 kilovolt circuitRailway Twin Tube Simplon Tunnel nbsp nbsp Lepontine Alps Switzerland Italy 19 803 m 12 305 mi 1906 Parallel tunnel was opened in 1922 19 824 m long longest transit tunnel until Daishimizu Tunnel was opened Part of the NRLA Railway Follo Line nbsp Oslo Norway 19 500 m 12 117 mi 2022 54 55 Groundbreaking 2014 56 Metro Koltsevaya Line Circle Line nbsp Moscow Metro Russia at the time of construction nbsp Soviet Union 19 400 m 12 055 mi 1950 1954Hydroelectric Futang Hydroelectric Power Station Water Tunnel nbsp Sichuan China 19 319 m 12 004 mi 2004 57 Metro Seoul Subway Bundang Line Suwon station Jukjeon station nbsp Yongin and Suwon in South Korea 19 300 m 11 992 mi 2007 2013Railway Single Tube Qamchiq Tunnel 58 nbsp Angren Pap railway Uzbekistan 19 200 m 11 930 mi 2016 Longest non metro railway tunnel in ex USSRMetro North East line nbsp MRT Singapore 19 200 m 11 930 mi 2003 2011 World s first fully automated and driverless underground rapid transit lineMetro Suzhou Rail Transit Line 2 nbsp Suzhou China 19 146 m 11 897 mi 2009 2012Metro Maskoŭskaja Line nbsp Minsk Metro Belarus construction started at the time of nbsp Soviet Union 19 100 m 11 868 mi 1984 2014Railway Single Track Vereina nbsp Silvretta Switzerland 19 058 m 11 842 mi 1999 Single track with passing loops metre gaugeMetro Seoul Subway Line 4 Ssangmun Ichon nbsp Seoul South Korea 19 000 m 11 806 mi 1980Wastewater Harbour Area Treatment Scheme HATS Stage 2 59 nbsp Hong Kong China 18 800 m 11 682 mi 2015Railway Shin Kanmon Tunnel nbsp Kanmon Straits Japan 18 713 m 11 628 mi 1975Hydroelectric Shiziping Hydroelectric Power Station Water Tunnel nbsp Sichuan China 18 712 m 11 627 mi 2010 60 Railway Single Tube Vaglia nbsp Bologna Firenze Italy 18 711 m 11 626 mi 2009 Bologna Florence high speed railwayHydroelectric Baoxing Hydroelectric Power Station Water Tunnel nbsp Sichuan China 18 676 m 11 605 mi 2007Railway Single Tube Apennine Base Tunnel nbsp Tuscan Emilian Apennines Italy 18 507 m 11 500 mi 1934Metro Obolonsko Teremkivska line nbsp Kyiv Metro Ukraine construction started at the time of nbsp Soviet Union 18 480 m 11 483 mi 1976 2013Metro Istanbul Metro Line M3 nbsp Istanbul Turkey 18 460 m 11 471 mi 2013 2022Railway Twin Tube Qinling Tunnel I II nbsp Qin Mountains China 18 460 m 11 471 mi 2000 2 tubes left tube is 18460 meters right tube is 18456 meters 61 Hydroelectric Tatev Hydroelectric Power Station Water Tunnel nbsp Armenia at the time of construction nbsp Soviet Union 18 400 m 11 433 mi 1970Road Twin Tube Yamate Tunnel nbsp Tokyo Japan 18 200 m 11 309 mi 2015Railway South Taihangshan Tunnel nbsp Shanxi China 18 125 m 11 262 mi 2014 62 2 tubes part of Shanxi Henan Shandong railwayMetro Shanghai Subway Line 1 nbsp Shanghai China 18 110 m 11 253 mi 1995Metro Avtozavodskaya Line nbsp Minsk Metro Belarus construction started at the time of nbsp Soviet Union 18 100 m 11 247 mi 1990 2005Road Twin Tube Zhongnanshan Tunnel nbsp Shaanxi China 18 040 m 11 210 mi 2007 The longest road tunnel in ChinaMetro Line 2 Athens Metro 38 nbsp Athens Greece 17 900 m 11 123 mi 1991 2013Metro Beijing Subway Line 5 nbsp Beijing China 17 825 m 11 076 mi 2007Hydroelectric Shuakhevi headrace and pressure tunnel nbsp Shuakhevi Adjara Georgia 17 800 m 11 060 mi 63 2013 2017Metro Ankara Metro AKM Koru nbsp Ankara Turkey 19 660 m 12 216 mi 1997 2014 M1 line is tunnel in Kizilay between AKM M2 line is completely underground Road Jingpingshan nbsp Sichuan China 17 500 m 10 874 mi 2008 The deepest transportation tunnel in ChinaMetro Shenzhen Subway Longgang Line nbsp Shenzhen China 17 333 m 10 770 mi 2010 2011Metro Kholodnohirsko Zavodska Line nbsp Kharkiv Metro Ukraine at the time of construction nbsp Soviet Union 17 300 m 10 750 mi 1975 1978Metro Seoul Subway Shinbundang Line nbsp Seoul and Seongnam in South Korea 17 300 m 10 750 mi 2011Water supply Mavi Tunel Blue Tunnel 64 nbsp Konya Turkey 17 034 m 10 584 mi 2012 Breakthrough 2007Road Gotthard Road Tunnel nbsp Lepontine Alps Switzerland 16 918 m 10 512 mi 1980Metro Guangzhou Metro Line 4 nbsp Guangzhou China 16 790 m 10 433 mi 2005Metro Izmir Metro Line M1 nbsp Izmir Turkey 16 750 m 10 408 mi 2000 2023Metro Barcelona Metro Line 4 nbsp Barcelona Spain 16 700 m 10 377 mi 1929 1999Metro Seoul Subway Line 2 Jamsil Sillim nbsp Seoul South Korea 16 700 m 10 377 mi 1980 1984Metro Barcelona Metro Line 3 nbsp Barcelona Spain 16 600 m 10 315 mi 1924 2001Metro Barcelona Metro Line 5 nbsp Barcelona Spain 16 600 m 10 315 mi 1959 1983Water supply Murrumbidgee Eucumbene Tunnel 44 nbsp New South Wales Australia 16 600 m 10 315 mi 1961 Part of the 145 km tunnel network of the Snowy Mountains SchemeMetro Istanbul Metro Line M2 nbsp Istanbul Turkey 16 500 m 10 253 mi 2000 2009Metro Beijing Subway Line 9 nbsp Beijing China 16 500 m 10 253 mi 2011 2012Hydroelectric Jinkang Hydroelectric Power Station Water Tunnel nbsp Sichuan China 16 490 m 10 246 mi 2006Metro Madrid Metro Line 8 nbsp Madrid Spain 16 467 m 10 232 mi 1998 2007Metro Guangzhou Metro Line 1 nbsp Guangzhou China 16 449 m 10 221 mi 1997Metro Madrid Metro Line 3 nbsp Madrid Spain 16 424 m 10 205 mi 1939 2007Railway Rokkō Tunnel 65 nbsp Mount Rokkō Japan 16 250 m 10 097 mi 1972Railway Solan Tunnel 66 nbsp Taebaek Gangwon do South Korea 16 240 m 10 091 mi 2012 Taebaek Line includes a spiralHydroelectric Kemano T1 and T2 67 nbsp CAN Kemano Canada 16 000 m 9 942 mi 1954 2022 Twin 16 km hydroelectric tunnels T1 was completed in 1954 and T2 was completed in May 2022 68 Both are in operation Metro Seoul Subway Line 7 Suraksan Konkuk University nbsp Seoul South Korea 16 000 m 9 942 mi 1996Railway Munsterertunnel de nbsp Tyrol Austria 15 990 m 9 936 mi 2012 Longest tunnel in Austria Railway Xiangshan Tunnel 象山隧道 nbsp Fujian China 15 917 m 9 890 mi 2012 2 tubes part of Longyan Xiamen RailwayRailway Terfnertunnel de nbsp Tyrol Austria 15 840 m 9 843 mi 2012Former railway Henderson Tunnel 69 70 nbsp Front Range United States 15 800 m 9 818 mi 1976 Narrow gauge railway replaced by a conveyor belt in 1999 Only one portal served an underground mine 71 Metro Istanbul Metro Line M9 nbsp Istanbul Turkey 15 800 m 9 818 mi 2013 2024Water supply Pandaoling Tunnel Datong River Diversion to Shaanxi Project nbsp Shaanxi China 15 723 m 9 770 mi 1994Metro Copenhagen Metro City Circle Line nbsp Denmark 15 500 m 9 631 mi 2019 Longest railway tunnel in Denmark and ScandinaviaMetro Budapest Metro Line 3 72 nbsp Hungary 15 500 m 9 631 mi 1976 1990 Line 3 is actually 17 39 km long but only 15 5 km of it is underground Railway Single Track Furka Base nbsp Urner Alps Switzerland 15 442 m 9 595 mi 1982 Single track with passing loops metre gaugeRailway Twin Tube Ceneri Base Tunnel nbsp Lepontine Alps Switzerland 15 400 m 9 569 mi 2020 Part of the NRLAMetro Seoul Subway Line 3 Gupabal Geumho nbsp Seoul South Korea 15 400 m 9 569 mi 1985Metro Tianjin Subway Line 1 nbsp Tianjin China 15 378 m 9 555 mi 1976 2006Railway Haruna nbsp Gunma Prefecture Japan 15 350 m 9 538 mi 1982Railway Single Track Severomuysky Tunnel nbsp Severomuysky Range Russia construction started at the time of nbsp Soviet Union 15 343 m 9 534 mi 2003Wastewater Deer Island Outfall Tunnel 73 nbsp Deer Island Boston Massachusetts United States 15 290 m 9 501 mi 2000 24 ft 7 3 m diameter 42m2 cross section discharges treated effluent into Atlantic OceanRailway Single Tube Firenzuola nbsp Bologna Firenze Italy 15 285 m 9 498 mi 2009 Bologna Florence high speed railwayHydroelectric Inguri Hydroelectric Power Station Water Tunnel nbsp Georgia at the time of construction nbsp Soviet Union 15 279 m 9 494 mi 1978Metro Shanghai Subway Line 2 nbsp Shanghai China 15 274 m 9 491 mi 2000 Between Zhanjianggaoke station and Lingkong StationWater supply Jinquidi Tunnel Niulan River Diversion to Dianchi nbsp Yunnan China 15 257 m 9 480 mi 2013Hydroelectric Baotan Hydroelectric Power Station Water Tunnel nbsp Guangxi China 15 200 m 9 445 mi 2010Railway Gorigamine Tunnel 65 nbsp Takasaki Nagano Japan 15 175 m 9 429 mi 1997Hydroelectric Xuecheng Hydroelectric Power Station Water Tunnel 74 nbsp Sichuan China 15 174 m 9 429 mi 2007Railway Single Track Monte Santomarco nbsp Paola Cosenza Italy 15 040 m 9 345 mi 1987Railway Single Tube Gotthard Rail Tunnel nbsp Lepontine Alps Switzerland 15 003 m 9 322 mi 1882 Longest transit tunnel until Simplon Tunnel was opened Metro Gwangju Metro Line 1 Sotae station Dosan station nbsp Gwangju South Korea 15 000 m 9 321 mi 2004Railway Nakayama Tunnel nbsp Gunma Prefecture Japan 14 857 m 9 232 mi 1982 Jōetsu ShinkansenWater supply Dangara Irrigation Tunnel 75 nbsp Nurek Tajikistan at the time of construction nbsp Soviet Union 14 800 m 9 196 mi 1987Railway Cuajone El Sargento nbsp Ilo Toquepala Cuajone Industrial Railroad Southern Peru Copper Corporation Peru 14 724 m 9 149 mi 76 1975Railway Single Tube Mount Macdonald Tunnel nbsp Rogers Pass Glacier National Park Canada 14 723 m 9 148 mi 1989Railway Maglev Misaka Sasago Tunnel nbsp Yamanashi Japan 14 613 m 9 080 mi 1996 Part of the Chuo Shinkansen Maglev Already used as Yamanashi Test Track since 1996 Railway Single Tube Lotschberg Tunnel nbsp Bernese Alps Switzerland 14 612 m 9 079 mi 1913Water supply Caoe River Diversion Project nbsp Zhejiang China 14 600 m 9 072 mi 2011Railway Single Tube Romerike Tunnel nbsp Oslo Lillestrom Norway 14 580 m 9 060 mi 1999Railway Fajiushan Tunnel 77 nbsp Shanxi China 14 573 m 9 055 mi 2014 Part of Shanxi Henan Shandong railway Water supply Snowy Geehi Tunnel 44 nbsp New South Wales Australia 14 500 m 9 010 mi 1966 Part of the 145 km tunnel network of the Snowy Mountains SchemeMetro Seoul Subway Line 4 Isu Beomgye nbsp Seoul Gwacheon and Anyang in South Korea 14 500 m 9 010 mi 1980 1994Road Zigana Tunnel nbsp Torul Macka Turkey 14 481 m 8 998 mi 78 2023 79 Longest road tunnel in TurkeyHydroelectric Jisha Hydroelectric Power Station Water Tunnel nbsp Yunnan China 14 467 m 8 989 mi 2007Road Twin tube Ryfylke Tunnel nbsp Stavanger Strand Norway 14 400 m 8 948 mi 2019 Longest underwater road tunnel in the worldWater supply 6 Tunnel Yellow River Diversion to Shanxi South Line nbsp Shanxi China 14 400 m 8 948 mi 2002 See South North Water Transfer ProjectWater supply Ala Mountain Pass Water Supply Project nbsp Xinjiang China 14 346 m 8 914 mi 2010Road Twin Tube Ovit Tunnel 80 nbsp Erzurum Province Rize Province Turkey 14 346 m 8 914 mi 2018Metro Stockholm Metro Tunnelbana 3 Blue Line Kungstradgarden Hjulsta nbsp Stockholm Sweden 14 300 m 8 886 mi 1975 1977Railway Single Tube Dayaoshan Tunnel 81 nbsp Nanling Mountains China 14 294 m 8 882 mi 1987Metro Istanbul Metro Line M8 nbsp Istanbul Turkey 14 270 m 8 867 mi 2023 82 Hydroelectric Zaramag Hydroelectric Power Station Water Tunnel 83 84 nbsp Ardon River North Ossetia Russia 14 226 m 8 840 mi 2015 85 Water supply Tooma Tumut Tunnel 44 nbsp New South Wales Australia 14 200 m 8 823 mi 1961 Part of the 145 km tunnel network of the Snowy Mountains SchemeMetro Metro Lisbon Blue Seagull Line nbsp Lisbon Portugal 14 000 m 8 699 mi 1959 2007Metro MTR Island line West of Heng Fa Chuen nbsp Hong Kong China construction started at the time of nbsp British Hong Kong 14 000 m 8 699 mi 1985 2014Road Arlberg Road Tunnel nbsp Arlberg Austria 13 972 m 8 682 mi 1978Water supply Shanggongshan Tunnel Zhangjiuhe Water Supply Project nbsp Yunnan China 13 941 m 8 663 mi 2007Hydroelectric Dayingshan 4 Hydroelectric Power Station Water Tunnel nbsp Yunnan China 13 932 m 8 657 mi 2009 8 5 m in diameter 57m2 cross section Railway Hokuriku Tunnel nbsp Fukui Prefecture Japan 13 870 m 8 618 mi 1962 Hokuriku Main LineRailway Single Tube Xiapu Tunnel nbsp Fujian China 13 838 m 8 599 mi 2009Railway Twin Tube Yesanguan Tunnel nbsp Hubei China 13 838 m 8 599 mi 2010 Tube I 13838 meters tube II 13796 metersHydroelectric Centrala Hidroelectrică Lotru Ciunget nbsp Ciungetu Romania 13 719 m 8 525 mi 1972 5 m in diameterRailway Single Tube Frejus Mont Cenis nbsp nbsp Alps France Italy construction started in the Kingdom of Sardinia 13 657 m 8 486 mi 1871 Longest transit tunnel until Gotthard Tunnel was opened Road Twin Tube Xishan Tunnel nbsp Shanxi China 13 654 m 8 484 mi 2012 Left tube 13654 meters right tube 13570 metersRailway Single Tube North Tianshan Tunnel nbsp Xinjiang China 13 610 m 8 457 mi 2009Railway Marmaray nbsp Istanbul Turkey 13 600 m 8 451 mi 2013 Built next to a fault zone between two continentsRailway Single Track Savio Rail Tunnel nbsp Helsinki Kerava Finland 13 575 m 8 435 mi 2008Metro Busan Metro Line 3 Suyeong Deokcheon nbsp Busan South Korea 13 500 m 8 389 mi 2005Railway Twin Tube Shin Shimizu Tunnel 65 nbsp Mount Tanigawa Japan 13 500 m 8 389 mi 1967Road Mount Erlang Tunnel nbsp Sichuan China 13 433 m 8 347 mi 2018 Erlangshan extra long tunnel part of Yakang ExpresswayRailway Single Track Hex River Tunnel 86 nbsp Hex River Pass South Africa 13 400 m 8 326 mi 1989Railway Wonhyo Tunnel 87 88 nbsp Ulsan South Korea 13 270 m 8 246 mi 2010 Gyeongbu high speed railwayRailway Single Tube Dabieshan Tunnel nbsp Hubei China 13 256 m 8 237 mi 2008Railway Schlern Tunnel 89 nbsp South Tyrol Italy 13 159 m 8 177 mi 1993Railway Single Tube Caponero Capoverde nbsp Genova Ventimiglia Italy 13 135 m 8 162 mi 2001 Includes an underground station San Remo Road Twin Tube Hongtiguan Tunnel nbsp Shanxi China 13 122 m 8 154 mi 2013 Left tube 13122 meters right tube 13098 metersMetro Barcelona Metro line 2 nbsp Barcelona Spain 13 100 m 8 140 mi 1985 1997Railway Aki Tunnel nbsp San yō Shinkansen Japan 13 030 m 8 096 mi 1975Many more tunnels exist that are shorter than 13 000 metres 8 mi World s longest tunnels under construction editType Name Location Length Year CommentWater Supply Kashuang Water Tunnel nbsp Xinjiang China 280 000 m 173 984 mi Water transfer from the snow melt of Altai Mountains to the arid region of Xinjiang 90 Water Supply New York City Water Tunnel No 3 nbsp New York State United States 96 560 m 60 000 mi 2026 91 More water supply for New York City Partially in use Metro Paris Metro Line 15 nbsp Paris Ile de France France 75 000 m 46 603 mi 2025 2030 Circular line will form the longest subway tunnel Railway Twin Tube Mont d Ambin Base Tunnel nbsp nbsp Cottian Alps France Italy 57 500 m 35 729 mi 2032 92 Part of the Lyon Turin high speed railway Reconnaissance tunnels under construction since 2002 construction of main tunnel started in 2016 93 Railway Twin Tube Brenner Base Tunnel nbsp nbsp Stubai Alps Austria Italy 55 000 m 34 175 mi 2032 94 Construction started in March 2015 Together with the already constructed Inntal Tunnel it will form the world s longest continuous railway tunnel with 64 km 95 96 Metro Thomson East Coast Line nbsp MRT Singapore 43 000 m 26 719 mi 2024 Excluding planned extensionRailway Yigong tunnel nbsp Tibet China 42 500 m 26 408 mi 97 2030 Part of the Sichuan Tibet railway Construction started in November 2020 98 Metro Athens Metro Line 4 nbsp Athens Greece 38 200 m 23 736 mi 99 2029 Construction of 1st phase started in June 2021 100 total length may be changed Railway Sejila tunnel nbsp Tibet China 37 900 m 23 550 mi 101 2030 Part of the Sichuan Tibet railway Construction started in November 2020 102 non primary source needed Railway Maglev Daiichi Shutoken Tunnel citation needed nbsp Tokyo Japan 36 924 m 22 944 mi citation needed After 2027 Part of the Chuo Shinkansen Maglev Mineral transportation Woodsmith Mine Tunnel Potash Project Mineral Transport System MTS nbsp North York Moors United Kingdom 36 700 m 22 804 mi 103 104 6 m in diameter 105 incorporating conveyor and maintenance access Start of construction was planned for 2016 but actually started in April 2019 106 107 Railway Gaoligongshan Tunnel nbsp Yunnan China 34 538 m 21 461 mi 2025 108 Railway between Dali and Ruili Construction started in August 2017 109 Railway Maglev Daiichi Chukyoken Tunnel citation needed nbsp Nagoya Japan 34 210 m 21 257 mi citation needed After 2027 Part of the Chuo Shinkansen Maglev Metro L9 nbsp Barcelona Spain 33 000 m 20 505 mi 2009 2016 partial completion Excluding branches Northern section of the line is in operation since 2009 12 13 Southern section of the line is in operation since 2016 02 12 Future of central section is unclear Railway Twin Tube Koralm Tunnel nbsp Koralpe Austria 32 900 m 20 443 mi 2026 110 Part of the Koralm Railway boring of main tunnel started at the west portal in May 2010 111 Railway Oshima Tunnel nbsp Hokkaido Japan 32 675 m 20 303 mi 2031 Part of the Hokkaido Shinkansen Metro Cross Island Line nbsp MRT Singapore 29 000 m 18 mi 112 Phase 1 only 2030 Phase 1 2032 Phase 2 Construction of Phase 1 started in January 2023 113 Water Supply NCP Canal Main Tunnel nbsp Anuradhapura East Sri Lanka 27 800 m 17 274 mi 2025 Part of North Central Province Canal under Mahaweli Development programme Low slope tunnel with gravity flow 8m in diameter Supplies water from Moragahakanda Reservoir to North Central and Northern Provinces 114 Railway Twin Tube Valico Tunnel nbsp Ligurian Apennines Italy 27 342 m 16 990 mi 115 2026 Breakthrough in September 2020 116 Part of the Tortona Genoa high speed railway Railway Twin Tube Semmering Base Tunnel nbsp Lower Austria Styria Austria 27 300 m 16 963 mi 2030 117 Construction of the first contract section started in January 2014 118 Will cut travel time between Vienna and Graz by 30 minutes and is part of the Baltic Adriatic CorridorRoad Rogfast tunnel nbsp Randaberg Bokn Norway 26 700 m 16 591 mi 2033 119 Construction started in January 2018 halted October 2019 due to expected cost overruns revised plan and 48 cost increase approved November 2020 construction restarted late 2021 120 Will be the longest road tunnel in the world and also the deepest undersea tunnel 392 metres 1 286 ft below sea level It will also have a 4 100 m 2 548 mi connection tunnel from Kvitsoy to the main tunnel Railway Sasson Tunnel citation needed nbsp Hokkaido Japan 26 230 m 16 299 mi citation needed 2031 Part of the Hokkaido Shinkansen Metro Suburban Rail Loop East nbsp Melbourne Victoria Australia 26 000 m 16 mi a 2035 121 Construction started in June 2022 122 SRL North is still under early planning projected to be completed by 2053 Water Supply Mae Taeng Mae Ngat Tunnel 123 nbsp Chiang Mai Thailand 25 624 m 15 922 mi 124 4 m in diameter This tunnel is a part of Mae Taeng Mae Ngat Mae Kuang Diversion Tunnel Project Railway Maglev Minami Alps Tunnel citation needed nbsp Akaishi Mountains Japan 25 019 m 15 546 mi citation needed After 2027 Part of the Chuo Shinkansen Maglev Railway Maglev Chuo Alps Tunnel citation needed nbsp Kiso Mountains Japan 23 288 m 14 470 mi citation needed After 2027 Part of the Chuo Shinkansen Maglev Metro Metro Manila Subway nbsp Metro Manila Philippines 23 160 m 14 391 mi 2028 Only for the dedicated mainline between East Valenzuela and FTI 125 To be partially opened in 2025 126 Road Twin Tube Sengli Daban Tunnel nbsp Xinjiang China 22 035 m 13 692 mi 2026 127 Construction started in 2020 It bypasses Sengli Daban mountain pass which sits up at 4091 meters above the sea level Once completed it will become the longest road tunnel in the world at an altitude of over 4000m Railway Thane Creek Tunnel 128 nbsp Mumbai India 21 150 m 13 142 mi 129 2028 130 Part of the Mumbai Ahmedabad high speed railway construction started in November 2023 131 13 m diameter 132 Railway Shin Hokuriku Tunnel citation needed nbsp Fukui Japan 19 760 m 12 278 mi citation needed 2024 citation needed Part of the Hokuriku ShinkansenRailway Twin tube Bentong Tunnel Genting Tunnel nbsp Bentong Pahang Malaysia 18 000 m 11 185 mi 2027 Part of MRL East Coast Rail Link project Will became the longest tunnel in South East Asia 133 Railway Shiribeshi Tunnel citation needed nbsp Hokkaido Japan 17 975 m 11 169 mi citation needed 2031 Part of the Hokkaido Shinkansen Road and railway Fehmarn Belt Fixed Link nbsp nbsp Fehmarn Belt Germany Denmark 17 600 m 10 936 mi 2029 134 Construction started in January 2021 135 Railway Tateiwa Tunnel citation needed nbsp Hokkaido Japan 16 980 m 10 551 mi citation needed 2031 Part of the Hokkaido Shinkansen Road Forbifart Stockholm 136 nbsp Stockholm Sweden 16 500 m 10 253 mi 2030 137 Construction started in August 2014Road Tokyo Gaikan Tunnel citation needed nbsp Tokyo Japan 16 200 m 10 066 mi citation needed 2030 citation needed Part of the C3 Tokyo Gaikan Expressway Railway Zhoushan underwater tunnel nbsp Zhejiang China 16 200 m 10 066 mi 138 2026 138 Part of the Ningbo Zhoushan railway Construction started in December 2020 139 Railway Twin Tube Chiltern tunnel nbsp Chiltern Hills United Kingdom 16 040 m 9 967 mi 2029 2033 140 Part of High Speed 2 141 construction started in May 2021 142 9 1 m internal diameter 143 Railway Uchiura Tunnel citation needed nbsp Hokkaido Japan 15 560 m 9 669 mi citation needed 2031 Part of the Hokkaido Shinkansen Railway Maglev Ina Sanchi Tunnel citation needed nbsp Nagano Japan 15 300 m 9 507 mi citation needed After 2027 Part of the Chuo Shinkansen Maglev Railway Devprayag Rail Tunnel citation needed nbsp Uttarakhand India 15 270 m 9 488 mi citation needed 2024 2025 citation needed Part of Rishikesh Karnaprayag line 144 Railway Maglev Hiyoshi Tunnel citation needed nbsp Gifu Japan 14 532 m 9 030 mi citation needed After 2027 Part of the Chuo Shinkansen Maglev Road Zoji la Tunnel nbsp Zoji La Pass India 14 200 m 8 823 mi 145 2026 Construction started in October 2020 146 Railway Patalpani Rail Tunnel citation needed nbsp Madhya Pradesh India 14 000 m 8 699 mi citation needed 2025 citation needed Metro MRT Orange Line 147 nbsp Bangkok Thailand 13 770 m 8 556 mi 2025 Orange Line Phase 1Railway Twin Tube Northolt tunnel nbsp West London United Kingdom 13 500 m 8 389 mi 2029 2033 140 Part of High Speed 2 construction started in October 2022 148 Metro Izmir Metro Line M2 nbsp Izmir Turkey 13 500 m 8 389 mi 149 2026Metro Istanbul Metro Line M12 nbsp Istanbul Turkey 13 030 m 8 096 mi 2025World s longest tunnels advanced planning stage editType Name Location Length Year CommentWater supply Tibet Xinjiang Tunnel nbsp Tibet Xinjiang China 1 000 000 m 621 4 mi China preparing world s longest tunnel to divert Tibet river to desert 150 Railway Bohai Strait tunnel nbsp Bohai Strait China 123 000 m 76 4 mi Tunnel between Dalian on the Liaodong Peninsula and Yantai on the Shandong Peninsula Railway Talsinki nbsp nbsp Helsinki Tallinn Finland Estonia 100 000 m 62 1 mi After 2030 Awaiting financingWater supply Qinling Tunnel Han River Diversion to Wei River citation needed nbsp Shaanxi China 98 300 m 61 1 mi citation needed Railway Serra do Mar Tunnel 151 nbsp Brazil between Sao Paulo and Santos 30 000 m 18 6 mi Railway Twin Tube Tachlovice Tunnel nbsp Prague Beroun Czech Republic 24 700 m 15 3 mi 152 After 2035 Project is on holdMetro Izmir Metro Line M3 nbsp Izmir Turkey 22 300 m 13 857 mi 2020sMetro Istanbul Metro Line M13 nbsp Istanbul Turkey 21 900 m 13 6 mi 2020sRailway and electricity Grimsel Tunnel nbsp Grimsel Pass Switzerland 21 720 m 13 5 mi 153 2025 2026 Feasibility studyRailway Twin tube Pacheco Pass Tunnels nbsp Pacheco Pass California United States 21 000 m 13 0 mi 2031 To be built as part of the California High Speed Rail projectRoad Twin tube Gohpur Numaligarh Tunnel nbsp Assam India 15 600 m 9 693 mi 154 Tunnel under the Brahmaputra RiverRoad Twin tube Kresna Gorge Tunnel 155 nbsp Kresna Bulgaria 15 400 m 9 6 mi Cancelled Part of Struma motorway connecting Sofia and Athens Road Twin tube Agua Negra Tunnel nbsp nbsp Agua Negra Pass Argentina Chile 14 000 m 8 7 mi Awaiting ratification by Chile citation needed World s longest tunnels abandoned editType Name Location Length Year CommentWater supply Gadara Aqueduct Roman Empire 94 000 m 58 4 mi 129 Water supply for the Decapolis in present day JordanWorld s longest tunnels proposed editBering Strait crossing Japan Korea Undersea Tunnel Taiwan Strait Tunnel Project Bass Strait TunnelSee also edit nbsp Wikimedia Commons has media related to Tunnel List of long tunnels by type contains separate tables for railroad subway vehicular bicycle water aqueducts and also for different building techniques List of deepest caves List of deepest mines Lists of tunnels List of longest railway tunnels List of long railway tunnels in China List of longest subway tunnel sections List of longest bridgesNotes edit Length does not include SRL North or West References edit Dahuofang Water Tunnel The Robbins Company Robbinstbm com Archived from the original on 22 March 2012 Retrieved 1 February 2016 Tras 11 anos de construccion inauguran el Tunel Emisor Oriente 23 December 2019 Archived from the original on 21 January 2022 Retrieved 22 January 2022 Ne 70 km a 57 5 Kak moskovskie vlasti udlinili Bolshuyu kolcevuyu liniyu metro 22 March 2023 Archived from the original on 27 March 2023 Retrieved 25 July 2023 IMG 20230327 063939 969 Postimages Archived from the original on 27 March 2023 Retrieved 25 July 2023 First stretch opens in 1969 as part of line 2 Project data raw construction Gotthard Base Tunnel PDF Lucerne Switzerland AlpTransit Gotthard Ltd 1 June 2016 Archived PDF from the original on 11 March 2016 Retrieved 15 December 2016 Wer hat die grosste Rohre Who has the longest tube Tages Anzeiger graphical animation in German Zurich Switzerland 14 April 2016 Archived from the original on 29 April 2016 Retrieved 11 May 2016 Mug Vladislav Konvicka Vladislav 2009 Stolovy vodovodni privadec z vodni nadrze Zelivka do Prahy Underground World Stola Water Delivery Conduit from the Water Tank Zelivka to Prague in Czech Archived from the original on 17 August 2014 Retrieved 27 February 2010 Wagenbreth Otfried 2002 125 Jahre Rothschonberger Stolln in German Archived from the original on 4 April 2023 Retrieved 26 December 2022 Korea completes record setting rail excavation Tunneltalk com Retrieved 16 June 2019 Official Korea Tourism Organization english visitkorea or kr Archived from the original on 18 April 2022 Retrieved 16 June 2019 Gidrospecproekt Arpa Sevan connecting tunnel gidrospetsproekt ru Archived from the original on 6 November 2020 Retrieved 16 June 2019 1961 1981 the Complex of Hydraulic Works for Transfer of the Arpa and Yeghegis Arpa Sevan Archived from the original on 22 November 2021 Retrieved 21 January 2022 1968 1980 Construction of Tunnel No 2 and of Arpa Sevan Conduit Arpa Sevan Archived from the original on 28 March 2022 Retrieved 21 January 2022 This Week In Armenian History Inauguration of the Arpa Sevan Tunnel March 21 1981 Thisweekinarmenianhistory blogspot com 21 March 2016 Archived from the original on 13 April 2019 Retrieved 16 June 2019 Pahang Selangor Raw Water Tunnel The Robbins Company Therobbinscompany com Archived from the original on 1 July 2016 Retrieved 30 May 2016 Laman Web Rasmi Kementerian Tenaga Teknologi Hijau dan Air Kettha gov my Archived from the original on 24 July 2018 Retrieved 30 May 2016 Downtown Line 3 officially opens Khaw Boon Wan announces review of fares incurred when switching between stations the Straits Times The Straits Times 20 October 2017 Archived from the original on 3 July 2019 Retrieved 1 February 2022 Stages Land Transport Authority lta gov sg Archived from the original on 3 July 2014 Retrieved 5 February 2022 Wahlstrom Ernest E 1974 History of Geologic Investigations Engineering Design and Construction Methods of the Harold D Roberts Tunnel Colorado PDF Archived PDF from the original on 24 October 2020 Retrieved 30 October 2020 莞惠城际最快明年启用 松山湖隧道长38公里 新浪东莞 Sina Corp Archived from the original on 20 January 2016 Retrieved 1 February 2016 世界最长高原铁路隧道 新关角隧道贯通 Xinhua News Agency Archived from the original on 19 April 2014 Retrieved 1 February 2016 Breakthrough on the Gerede Water Transmission Tunnel Tunnels amp Tunnelling International tunnelsonline info Archived from the original on 1 February 2022 Retrieved 1 February 2022 Gerede Water Transmission Tunnel Robbins Archived from the original on 1 February 2022 Retrieved 1 February 2022 Milwaukee Deep Tunnels MMSD com 13 August 2020 Archived from the original on 6 June 2021 Retrieved 6 June 2021 EVINOS MORNOS TUNNEL GREECE PDF Selitunnel com Archived PDF from the original on 13 May 2019 Retrieved 1 February 2016 Evinos Mornos Tunnel Greece Construction of a 30 km Long Hydraulic Tunnel in Less Than Three Years Under the Most Adverse Geological Conditions Document Summary new onemine org Archived from the original on 13 December 2013 Massachusetts Water Resources Authority December 2006 Water System Master Plan PDF pp 7 26 Archived PDF from the original on 4 March 2016 Retrieved 7 July 2013 Guadarrama Tunnel Structurae Archived from the original on 5 October 2013 Retrieved 1 February 2016 Massachusetts Water Resources Authority December 2006 Water System Master Plan PDF pp 7 25 Archived PDF from the original on 4 March 2016 Retrieved 7 July 2013 Awards tunnelintelligence com Archived from the original on 8 February 2012 Water from Melamchi finally arrives in Kathmandu kathmandupost com Archived from the original on 2 February 2022 Retrieved 21 April 2021 Melamchi Water Supply Project set to miss deadline yet again reports 97 work progress so far Archived from the original on 15 October 2020 Retrieved 14 October 2020 The LHC Facts and figures CERN 2008 Archived from the original on 16 July 2009 Retrieved 2 July 2009 Sanliurfa Sulama Tunelleri ve Tesisleri Insaati in Turkish Eren Insaati Archived from the original on 10 July 2011 Retrieved 1 October 2010 Collapse of headrace tunnel after grand opening Tunnel Talk February 2010 Archived from the original on 20 September 2012 Retrieved 27 September 2010 Ethiopia s Gilgel Gibe II hydropower plant resumes operation nazret com Archived from the original on 6 October 2017 Retrieved 16 June 2019 a b Urban Rail Transport SA METRO Line 1 Amel gr Archived from the original on 19 May 2012 Retrieved 1 February 2016 원주 제천 중앙선 복선전철 2011년 6월 착공 in Korean Yahoo 9 September 2010 Archived from the original on 14 September 2012 Retrieved 19 October 2010 Feasibility study and basic plan of Jungang Line for double track between Wonju and Jecheon Chunsuk Engineering Archived from the original on 22 July 2011 Retrieved 19 October 2010 Korea unveils new low carbon bullet train 4 January 2021 Gurgaon Metro set for operationalisation next week News webindia123 com Archived from the original on 30 November 2019 Retrieved 1 February 2016 GovHK Harbour Area Treatment Scheme Government of Hong Kong 25 November 2015 Archived from the original on 30 December 2015 Retrieved 1 February 2016 a b c d e Snowy Power of a nation Powerhousemuseum com Archived from the original on 3 March 2016 Retrieved 1 February 2016 Spooner William 8 July 1959 Eucumbene tumut tunnel ready for service ahead of schedule archived from the original on 15 May 2023 retrieved 16 June 2019 Archived copy Archived from the original on 21 July 2013 Retrieved 23 March 2014 span, wikipedia, wiki, book, books, library,