Editing Tunnel (section)

== Major accidents ==
* [[Clayton Tunnel rail crash]] (1861) – confusion about block signals leading to collision, 23 killed.
* [[Welwyn Tunnel rail crash]] (1866) – train failed in tunnel, guard did not protect train.
* [[Paris Métro train fire]] (1904) – train fire in Couronnes underground station, 84 killed by smoke and gases.
* [[Church Hill Tunnel|Church Hill Tunnel collapse]] (1925) – tunnel collapse on a work train during renovation, killing four men and trapping a steam locomotive and ten flat cars.
* [[Balvano train disaster]] (1944) – asphyxiation of about 500 "unofficial" passengers on freight train.
* [[Caldecott Tunnel fire]] (1982) – major motor vehicle tunnel crash and fire.
* [[1996 Channel Tunnel fire|Channel Tunnel fire]] (1996) – Train carrying [[Large goods vehicle|Heavy Good Vehicles (HGV)]] caught on fire. 
* [[Death of Diana, Princess of Wales|Princess Diana's death]] (1997) – Car crash in [[Pont de l'Alma]] tunnel, [[Paris]], which killed [[Princess Diana]].
* [[Mont Blanc tunnel fire|Mont Blanc Tunnel fire]] (1999) – Transport truck caught on fire and combusted inside tunnel.
* [[Big Dig ceiling collapse|Big Dig Ceiling collapse]] (2006) – Concrete ceiling panel falls in [[Fort Point Tunnel|Fort Point]] tunnel, [[Boston]], which causes the [[Big Dig|Big Dig project]] to be closed for a year.