How many tunnels are there in France?

France is home to over 60 tunnels of over 1,000m in length; four of those are over 10,000m in length and are often cited as modern engineering marvels. We've compiled a list of the most impressive tunnels, from the ground-breaking Channel Tunnel to the Mount Blanc Tunnel, an architectural feat.



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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.

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In cooperation with Rönesans Holding, the Heitkamp Construction Swiss GmbH tunnel and railroad construction specialists constructed the world's longest and deepest tunnel, the Gotthard Base Tunnel. This 57 kilometre-long tunnel lies at a depth of 2,300 metres.

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The Channel Tunnel is made of three separate tunnels running parallel to each other. One train tunnel running south (UK to France), one train tunnel running north (France to UK) and one service tunnel. All three tunnels were drilled below the seabed and link Folkestone in Kent to Coquelles in Pas-de-Calais.

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1. -The Laerdal tunnel. With its 24.5 kilometers, Laerdal tunnel is the longest in the world, traversing several mountainous formations between Laerdal and Aurland, in western Norway.

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10 of the world's greatest tunnels
  • Seikan Tunnel (Japan) — ...
  • Bund Sightseeing Tunnel (China) — ...
  • Gotthard Base Tunnel (Switzerland) — ...
  • Lærdal Tunnel (Norway) — ...
  • Channel Tunnel (UK and France) — ...
  • Tokyo Bay Aqua-Line (Japan) — ...
  • Eisenhower Tunnel (Colorado) — ...
  • Spiralen tunnel (Norway) —


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The infrastructure Eurotunnel Shuttles, Eurostar and freight trains runs on two monodirectional single-track tunnels. They are connected every 375 metres by cross-passages to a service tunnel, a road tunnel for the maintenance operations and eventually the evacuation of passengers.

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