At mt. Vernon.
Kallang-Paya Lebar Expressway (KPE) in Singapore with about 8.5 kilometres underground.
Tunnels are underground passages that are completely enclosed except for the entrance and exit. The longest road tunnel in the world is the Laerdal Tunnel, running over 80,000 feet. The fifth longest is the Hsuehshan Road Tunnel extending over 43,000 feet.
Which underground tunnel?? Tell us the game. If it is heartgold, soulsilver, firered, leafgreen, ruby, emerald, sapphire... Tell us!
yes
By defintion, a tunnel is underground.
The Eisenhower Tunnel is the longest vehicular tunnel.
There is no underground tunnel.
No, but the government is still working on it
Ted Williams/I-90 extention in Boston the longest at 2.6 miles.
Hebesberger UT (Rossleithen) has the longest tunnel
The world's longest canal tunnel is the Rove Tunnel in France. The Stad Ship Tunnel in Norway is shorter, wider, and deeper.
The tunnel between East Finchley and Morden (via Bank) is the Underground's longest and one of the longest rail tunnels in the world, 27.8km (17.25 miles). However, Morden is covered by a canopy and is therefore tru to your question but East Finchley is not. The previous station to East Finchley is Highgate, approximately 1200 metres from East Finchley.