The longest road tunnel in the world at 24.51 km (15.23 miles) long, is known as the Lærdal Tunnel and is located in Norway!
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.
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.
Switzerland
Kaimai - 8879 m - opened 12 September 1978 - near Apata on the East Coast Main Trunk Railway Line to Tauranga. It is the longest rail tunnel in New Zealand.
Ted Williams/I-90 extention in Boston the longest at 2.6 miles.
The Queensway tunnel under the River Mersey.
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.
Banihal Pass, Pir Panjal in Jammu & Kashmir-- INdia