What are tunnels used for?
Q: What are tunnels used for?
A: Tunnels can be used for cars, trains, ships, communication cables, electricity cables, and animals.
Q: What is the 'cut and cover' tunnel digging method?
A: The 'cut and cover' system involves digging a tunnel in the ground and building a roof above it for roads or infrastructure that are close to the ground.
Q: How long is the Channel Tunnel between France and England?
A: The Channel Tunnel between France and England is 50 kilometers long.
Q: What is the length of the longest tunnel in the world?
A: The longest tunnel in the world is being built in Switzerland; it is called Gotthard Base Tunnel and it will be over 100 kilometers long when completed.
