Changes

A '''tunnel''' is a passageway through or under an obstruction, like a mountain.

A '''tunnel''' is a passageway through or under an obstruction, like a mountain.

The [[world's longest tunnel]] is 57 kilometers (around 35 miles) through the [[Swiss Alps]], completed after 6 decades of work in 2010,<ref>[http://www.washingtontimes.com/news/2010/oct/15/joyous-swiss-celebrate-longest-tunnel-breakthrough/ Joyous Swiss celebrate longest tunnel]</ref> although it is not open to traffic yet.

 

The longest tunnel in operation is Japan's [[Seikan Tunnel]].

The [[Gotthard Base Tunnel]] is the world's longest tunnel with 57 kilometers (around 35 miles) through the [[Swiss Alps]], completed after 6 decades of work in 2010,<ref>[http://www.washingtontimes.com/news/2010/oct/15/joyous-swiss-celebrate-longest-tunnel-breakthrough/ Joyous Swiss celebrate longest tunnel]</ref> and opened on the first of June 2016, and in full service on 11 December 2016.<ref>http://www.bbc.com/news/world-europe-36423250</ref>

 

Until then the longest tunnel in operation was Japan's [[Seikan Tunnel]].

==Notes==

==Notes==

<references />

<references />

[[Category:Transportation]]

[[Category:Transportation]]