The Apennine Base Tunnel, alternatively known as the Grand Apennine Tunnel, is a railway base tunnel 18.507 kilometres (11.500 mi) long on the Bologna-Florence Direttissima line in central Italy.
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World's longest railway tunnel, Gotthard Base Tunnel, Switzerland.
The Laerdal Tunnel in western Norway is the longest road tunnel in the world. It takes about 20 minutes to pass through the tunnel. Brightly colored lights placed every six kilometers help drivers stay alert.
Longest motorway tunnels: the Frejus Tunnel in first place in Italy. The longest motorway tunnel in Italy is located under the Alps, on the border with France, connecting Bardonecchia in Val di Susa, and Modane, in the French Savoy.
Being 25 km long the Laerdal Tunnel i Norway is the world's longest road tunnel - and it is equipped with support and cable ladders from Oglaend System. To ease the drive through the 25 km long tunnel, there is a huge hall every 6 km.
China???????? has the most number of tunnels in the world. There are 16229 tunnels in China. The largest tunnel in China is Bohai Strait Tunnel. After China, Japan???????? has the most number of tunnels in the world.
Simplon Tunnel, railway tunnel from Iselle, Italy, to Brig, Switzerland, one of the longest railway tunnels in the world and one of history's great engineering feats. Running about 20 km (12.5 miles) long, it was the largest of the great Alpine tunnels when it opened to traffic in 1906.
It is actually composed of three tunnels, each 50km long, bored at an average 40m below the sea bed. They link Folkestone (Kent) to Coquelles (Pas-de-Calais). Eurotunnel Shuttles, Eurostar and freight trains runs on two monodirectional single-track tunnels.
Pan American HighwayThe longest road in the world is the Pan American Highway which begins in Prudhoe Bay, Alaska, and stretches all the way down to Ushuaia, Argentina. All in all, the road covers 30,000 km (19,000 miles).