Transportation
Longest Tunnels in the World
40 of 282
Name↕ | Type↕ | Location↕ | Length↕ | Year↕ | Comment↕ |
|---|---|---|---|---|---|
Delaware Aqueduct | Water supply | New York State, United States | 137,000 m (85.128 mi) | 1945 | 4.1 m in diameter (13.2 m). New York City's main water supply tunnel. |
Päijänne Water Tunnel | Water supply | Southern Finland, Finland | 120,000 m (74.565 mi) | 1982 | 16 m cross section. Main water supply tunnel for the Helsinki metropolitan area in southern Finland, drilled through solid rock. |
Suzhou Metro Line 3-11 | Metro | Suzhou, China | 86,542 m (53.775 mi) | 2019–2023 | Suzhou Metro Line 11 and Line 3 are connected at Weiting station with through trains operating. Longest metro tunnel |
Dahuofang Water Tunnel | Water supply | Liaoning, China | 85,320 m (53.015 mi) | 2009 | 8 m in diameter (50 m cross section) |
Orange–Fish River Tunnel | Water supply | South Africa | 82,800 m (51.450 mi) | 1972 | Longest continuous enclosed aqueduct in the Southern Hemisphere (22.5 m cross section). Built to divert water from the Orange River to the Great Fish River. |
Bolmen Water Tunnel | Water supply | Kronoberg/Scania, Sweden | 82,000 m (50.952 mi) | 1987 | 8 m cross section |
Istanbul Metro (Line M11) | Metro | Istanbul, Turkey | 69,000 m (42.875 mi) | 2023–2025 | Longest metro tunnel in Europe and longest tunnel in Turkey |
Chengdu Metro Line 6 | Metro | Chengdu, China | 68,223 m (42.392 mi) | 2020 | |
Neelum–Jhelum Hydropower Tunnel | Hydroelectric | Muzaffarabad, Azad Kashmir, Pakistan | 68,000 m (42.253 mi) | 2017 | Part of the 969 MW Neelum–Jhelum Hydropower Plant |
Tunel Emisor Oriente | Wastewater | Mexico City, Mexico | 62,500 m (38.836 mi) | 2019 | 7 m in diameter. Longest wastewater tunnel. |
Qingdao Metro Line 1 | Metro | Qingdao, China | 59,818 m (37.169 mi) | 2020–2021 | |
Guangzhou Metro Line 18 | Metro | Guangzhou, China | 58,300 m (36.226 mi) | 2021 | |
Guangzhou Metro Line 3 | Metro | Guangzhou, China | 57,930 m (35.996 mi)(Excl. branch) | 2005–2018 | |
Moscow Metro Bolshaya Koltsevaya line | Metro | Moscow, Russia | 57,538 m (35.752 mi)(Excl. branch) | 2018–2023 | Longest metro/rapid transit circular line |
Gotthard Base Tunnel | Railway Twin Tube | 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. Part of the NRLA. |
Beijing Subway Line 10 | Metro | Beijing, China | 57,100 m (35.480 mi) | 2008–2013 | |
Seikan Tunnel | Railway Single Tube | Tsugaru Strait, Japan | 53,850 m (33.461 mi) | 1988 | 74 m; 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). |
Beijing Subway Line 6 | Metro | Beijing, China | 53,400 m (33.181 mi) | 2012–2018 | |
Želivka Water Tunnel | Water supply | Central Bohemian Region, Czech Republic | 51,970 m (32.293 mi) | 1972 | 9–12 m |
Seoul Subway: Line 5 | Metro | 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. |
Rothschönberger Stolln | Wastewater | Freiberg Mining Field, Germany | 50,900 m (31.628 mi) | 1844–1882 | 6 m cross section, longest tunnel until 1945. Part of a UNESCO World Heritage Site. |
Channel Tunnel | Railway Twin Tube | 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 m + 1×18 m), running between Folkestone, Kent, and Coquelles, Pas-de-Calais. |
Yulhyeon Tunnel | Railway Single Tube | Seoul Capital Area, South Korea | 50,300 m (31.255 mi) | 2016 | 107 m, part of the Suseo high-speed railway. |
Tunel Emisor Central | Wastewater | Mexico City, Mexico | 49,742 m (30.908 mi) | 1975 | 6.5 m in diameter |
River Arpa – Lake Sevan tunnel | Water supply | Armenia (at the time of construction Soviet Union) | 48,358 m (30.048 mi) | 1981 | Longest tunnel built to restore ecological balance. Transfers water from the Arpa to Lake Sevan to recover its level. |
Pahang – Selangor Raw Water Transfer Project | Water supply | Pahang & Selangor, Malaysia | 44,600 m (27.713 mi) | 2014 | 5.2 m in diameter |
Wuhan Metro Line 2 | Metro | Wuhan, China | 44,347 m (27.556 mi) | 2012–2019 | — |
Lyublinsko-Dmitrovskaya Line (Zyablikovo – Fiztekh) | Metro | Moscow Metro, Russia (construction started at the time of Soviet Union) | 44,300 m (27.527 mi) | 1995–2023 | |
Shanghai Subway: Line 7 | Metro | Shanghai, China | 44,200 m (27.465 mi) | 2009–2010 | |
#1 Tunnel, Yellow River Diversion to Shanxi North Line | Water supply | Shanxi, China | 43,670 m (27.135 mi) | 2011 | See South–North Water Transfer Project |
#7 Tunnel, Yellow River Diversion to Shanxi South Line | Water supply | Shanxi, China | 43,500 m (27.030 mi) | 2002 | See South–North Water Transfer Project |
Beijing Subway Line 8 | Metro | Beijing, China | 42,600 m (26.470 mi) | 2012–2021 | |
Shanghai Metro Line 15 | Metro | Shanghai, China | 42,300 m (26.284 mi) | 2021 | |
Chengdu Metro Line 5 | Metro | Chengdu, China | 42,300 m (26.284 mi) | 2019 | |
Beijing Subway Line 14 | Metro | Beijing, China | 42,000 m (26.098 mi) | 2015–2021 | |
Tianjin Metro Line 6 | Metro | Tianjin, China | 42,000 m (26.098 mi) | 2016–2021 | |
Downtown line | Metro | MRT, Singapore | 41,900 m (26.035 mi) | 2013–2017 | Longest rapid transit line in South East Asia |
Nanjing Metro Line 3 | Metro | Nanjing, China | 41,567 m (25.829 mi) | 2011–2015 | From Xinghuolu station to Mozhoudonglu station. |
Suzhou Metro: Line 4 | Metro | Suzhou, China | 41,500 m (25.787 mi) | 2017 | |
Serpukhovsko-Timiryazevskaya Line (Altufyevo – Bulvar Dmitriya Donskogo) | Metro | Moscow Metro, Russia (construction started at the time of Soviet Union) | 41,470 m (25.768 mi) | 1983–2002 |
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