Editing Tunnel (section)

=== Notable ===
<!-- NOTE TO EDITORS: Sort entries by earliest known or expected date of completion. List distances by kilometres first, using the template {{convert|0.00|km|mi|abbr=on}} -->
[[File:Tunnel-large.jpg|thumb|right|The [[Big Dig]] road vehicle tunnel in [[Boston]], U.S.]]
[[File:Gerrards Cross railway station 2.jpg|thumb|right|The [[Gerrards Cross tunnel]] in England, completed in 2010. Looking west towards the station in March 2005, showing the extent of construction three months before a small section collapsed.]]
[[File:Sideling Hill Tunnel 2009.jpg|thumb|right|The eastern portal of the abandoned [[Sideling Hill Tunnel]], Pennsylvania, U.S., in 2009]]
* The [[Moffat Tunnel]], opened in 1928, passes under the [[Continental Divide of the Americas]] in [[Colorado]]. The tunnel is {{convert|10.0|km|mi|abbr=on}} long and at an elevation of {{convert|2816|m|ft|abbr=on}} is the highest active railroad tunnel in the U.S. (The inactive [[Tennessee Pass Line]] and the historic [[Alpine Tunnel]] are higher.)
* [[Williamson's tunnels]] in [[Liverpool]], from 1804 and completed around 1840 by a wealthy eccentric, are probably the largest underground [[folly]] in the world. The tunnels were built with no functional purpose. 
* The [[Chicago Tunnel Company|Chicago freight tunnel network]] is the largest urban street tunnel network, comprising {{convert|97|km|mi|abbr=on}} of tunnels beneath the majority of downtown [[Chicago]] streets. It operated between 1906 and 1956 as a freight network, connecting building basements and railway stations. Following a [[Chicago flood|1992 flood]] the network was sealed, although some parts still carry utility and communications infrastructure.
* The [[Pennsylvania Turnpike]] opened in 1940 with seven tunnels, most of which were bored as part of the stillborn [[South Pennsylvania Railroad]] and giving the highway the nickname "Tunnel Highway". Four of the tunnels ([[Allegheny Mountain Tunnel|Allegheny Mountain]], [[Tuscarora Mountain Tunnel|Tuscarora Mountain]], [[Kittatinny Mountain Tunnel|Kittatinny Mountain]], and [[Blue Mountain Tunnel|Blue Mountain]]) remain in active use, while the other three ([[Laurel Hill Tunnel|Laurel Hill]], [[Rays Hill Tunnel|Rays Hill]], and [[Sideling Hill Tunnel|Sideling Hill]]) were bypassed in the 1960s; the latter two tunnels are on a bypassed section of the Turnpike now commonly known as the [[Abandoned Pennsylvania Turnpike]].
* The [[Essingeleden|Fredhälls road tunnel]] was opened in 1966, in [[Stockholm, Sweden]], and the [[Elbe Tunnel (1975)|New Elbe road tunnel]] opened in 1975 in [[Hamburg, Germany]]. Both tunnels handle around 150,000 vehicles a day, making them two of the most trafficked tunnels in the world.
* The [[Honningsvåg Tunnel]] ({{convert|4.443|km|mi|abbr=on|sigfig=3}} long) opened in 1999 on [[European route E69]] in Norway as the world's northernmost road tunnel, except for mines (which exist on [[Svalbard]]).
* The Central Artery road tunnel in [[Boston, Massachusetts]], is a part of the larger [[Big Dig (Boston, Massachusetts)|Big Dig]] completed around 2007, and carries approximately 200,000 vehicles/day under the city along [[Interstate 93]], [[U.S. Route 1 in Massachusetts|US Route 1]], and [[Massachusetts Route 3]], which share a [[Concurrency (road)|concurrency]] through the tunnels. The Big Dig replaced Boston's old badly deteriorated I-93 elevated highway.
* The Stormwater Management And Road Tunnel or [[SMART Tunnel]], is a combined storm drainage and road structure opened in 2007 in [[Kuala Lumpur]], Malaysia. The {{convert|9.7|km|mi|abbr=on}} tunnel is the longest stormwater [[drainage tunnel]] in South East Asia and second longest in Asia. The facility can be operated as a simultaneous traffic and stormwater passage, or dedicated exclusively to stormwater when necessary.
* The [[Eiksund Tunnel]]<ref>{{Cite web |date=2008-03-02 |title=Safety: World's Deepest Subsea Tunnel Opens in Norway |url=http://www.tunnelintelligence.com/safety-in-detail-106.html |url-status=usurped |archive-url=https://web.archive.org/web/20120317104705/http://www.tunnelintelligence.com/safety-in-detail-106.html |archive-date=2012-03-17 |access-date=2024-01-23 |website=www.tunnelintelligence.com}}</ref> on national road Rv 653 in Norway is the world's deepest subsea road tunnel, measuring {{convert|7.776|km|mi|abbr=on}} long, with deepest point at {{convert|-287|m|ft|abbr=on}} below the sea level, opened in February 2008.
* [[Gerrards Cross Tunnel|Gerrards Cross railway tunnel]], in England, opened in 2010, is notable in that it converted an existing railway cutting into a tunnel to create ground to build a supermarket over the tunnel. The railway in the cutting was first opened around 1906, stretching over 104 years to complete a railway tunnel. The tunnel was built using the cover method with craned in prefabricated forms in order to keep the busy railway operating. A branch of the [[Tesco]] supermarket chain occupies the newly created ground above the railway tunnel, with an adjacent existing railway station at the end of the tunnel. During construction, a portion of the tunnel collapsed when soil cover was added. The prefabricated forms were covered with a layer of reinforced concrete after the collapse.<ref>{{cite web|url=http://www.nce.co.uk/news/transport/costain-finishes-gerrards-cross-tunnel-rebuild/5218141.article|title=Costain finishes Gerrards Cross tunnel rebuild|access-date=30 September 2014|date=19 May 2010}}</ref>
* The [[Fenghuoshan tunnel]], completed in 2005 on the [[Qinghai-Tibet railway]] is the world's highest railway tunnel, about {{convert|4.905|km|mi|abbr=on|sigfig=3}} above sea level and {{convert|1,338|m|mi|abbr=on|sigfig=3}} long.
* The [[La Línea (Road Pass)|La Linea]] Tunnel in [[Colombia]], 2016, is the longest, {{convert|8.58|km|mi|abbr=on|sigfig=3}}, mountain tunnel in South America. It crosses beneath a mountain at {{convert|2500|m|ft|abbr=on|sigfig=5}} <!-- needs clarification --> above sea level with six traffic lanes, and it has a parallel emergency tunnel. The tunnel is subject to serious [[groundwater]] pressure. The tunnel will link [[Bogotá]] and its urban area with the coffee-growing region, and with the main port on the Colombian Pacific coast.
* The [[Tunnel and Reservoir Plan|Chicago Deep Tunnel Project]] is a network of {{convert|175|km|mi|abbr=on}} of [[drainage tunnel]]s designed to reduce flooding in the [[Chicago metropolitan area|Chicago area]]. Started in the mid-1970s, the project is due to be completed in 2029.
* [[New York City Water Tunnel No. 3]], started in 1970, has an expected completion beyond 2026,<ref>{{Cite web |last=Kensinger |first=Nathan |date=22 April 2021 |title=NYC's Giant Water Tunnel Begins Work On Final Shafts, Following 50 Years Of Construction |url=https://gothamist.com/news/nycs-giant-water-tunnel-begins-work-on-final-shafts-following-50-years-of-construction |url-access=registration |access-date=15 September 2022 |website=Gothamist |language=en |quote=These last two shafts are now expected to be done by 2026, according to the DEP, but the tunnel still won't be complete. The original plans called for one more extension—a 14-mile conduit between Yonkers, the Bronx and Queens.}}</ref> and will measure more than {{convert|97|km|mi|abbr=on|adj=mid|long}}.<ref>{{cite web|url=http://www.nyc.gov/html/dep/html/news/3rdtunnel.html |archive-url=https://web.archive.org/web/20070621120811/http://www.nyc.gov/html/dep/html/news/3rdtunnel.html |archive-date=21 June 2007 |title=City Water Tunnel No. 3 |access-date=19 April 2013}}</ref>