The longest road tunnel in Europe and the World is the Laerdal Tunnel (Lærdalstunnelen) in Norway. It s a 24.5 km (15.2 mi)-long road tunnel connecting Lærdal and Aurland in Sogn og Fjordane county in western Norway. Construction started in 1995 and was completed in 2000, thus succeeding the Gotthard Road Tunnel as the longest road tunnel in the world. The tunnel is a part of the E16 main route between Oslo and Bergen.
The Eisenhower Tunnel is the longest vehicular tunnel.
The Oslofjord in Norway it runs for 7.3 KM hope this helped
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 Gotthard Base Tunnel is the second longest tunnel in Switzerland, measuring about 57 kilometers in length. This rail tunnel runs underneath the Swiss Alps and serves as an important transportation route connecting northern and southern Europe.
The world's longest canal that is also a tunnel is the Rove tunnel located in France. It was built in 1974. The longest tunnel in the world is a railroad tunnel that is 35 miles long through the Swiss Alps.
World's longest tunnel situated in New York state, United States named Delaware Aqueduct tunnel
The world's longest railroad tunnel is the Seikan Tunnel, it is 33.49 miles long.
The longest rock tunnel in the world is located in the New York City.
B. Suez canal Tunnel
The Seikan Tunnel is in japan. it is one of the longest in the world.