How long is the longest tunnel in the world?

How long is the longest tunnel in Europe?

Lærdal Tunnel. Norway. 24.51 kilometers long. It's the longest road tunnel on teh planet. The drive takes over 20 minutes. It's not just a passage; it's an environment.

The design is deliberate. They broke the drive into sections. Three massive, blue-lit caverns interrupt the monotony. It feels like driving through a frozen cave. Drove it last august, the temperature drop is real.

• Lærdal Tunnel (Norway): 24.51 km. The undisputed champion. Its caverns are a unique solution to driver fatigue.
• Gotthard Road Tunnel (Switzerland): 16.9 km. A critical Alpine crossing. The sheer volume of traffic inside is intense. A major artery for European logistics.
• Ryfylke Tunnel (Norway): 14.4 km. The world's deepest subsea road tunnel. It plunges 292 meters below sea level. A modern engineering marvel.
• Fréjus Road Tunnel (France/Italy): 12.87 km. Connects France and Italy. A constant stream of heavy trucks. The air always tastes of diesel.
• Mount Blanc Tunnel (France/Italy): 11.6 km. An older, iconic tunnel. Tolls are steep, paid almost 50 euros one way. The sense of history inside is tangible.

How long is the longest tunnel in Canada?

The longest is the Mount Macdonald Tunnel. It is 14.7 kilometers of darkness. A passage for trains.

It cuts through the Selkirk Mountains. British Columbia. I was near Revelstoke last fall. The scale of the rock is absolute. Our tunnels are just pinpricks.

• Official Name: Mount Macdonald Tunnel
• Length: 14.7 km (9.1 miles)
• Purpose: Canadian Pacific Railway freight. It reduces the grade.
• Completed: 1988

The Montreal Metro is a network. It is not one tunnel. The length figure is a sum of parts, a misunderstanding of systems. It is a web, not a line.

An older tunnel, the Connaught, runs nearby. Built in 1916. It was the longest for a time. Now it is the second choice. A new hole in the rock always makes the old one obsolete.

There are water tunnels that are longer. The Kemano tunnel is 16 km. But that is for moving water, not people. A different kind of pressure. The moutains dont care what flows through.

How long is the tunnel from Detroit to Canada?

The Detroit-Windsor Tunnel is 5,160 feet long. You're in Canada in less than five minutes. It dives under the Detroit River.

• Official Length: The tunnel portal to portal is 5,160 feet (1,573 meters).
• Depth: At its lowest point, the roadway is 75 feet below the river surface. It's a steep descent.
• Construction: Built in 1930. A relic of engineering that still works. They sank prefabricated steel tubes into a trench and connected them.
• Air System: The air inside is completely replaced every 90 seconds. Giant ventilation towers at each end handle the job. You can feel the pressure shift in your ears.
• Traffic Volume: About 12,000 vehicles pass through daily. Mostly cars and buses. I crossed last Friday around 11 PM, it was nearly empty. Eerily quiet.
• Ownership: It's jointly owned by the City of Windsor and Detroit and Canada Tunnel Corporation, an American company. A strange, binational arrangement.
• The Other Way: The Ambassador Bridge is the alternative. It handles most of the heavy trucks. The tunnel is the faster, more direct route for downtown-to-downtown travel. I always take the tunnel. Faster.

How long is the Montreal tunnel?

The Louis-Hippolyte Lafontaine Tunnel, an engineering marvel beneath the Saint Lawrence River, spans precisely 1,391 meters (4,563.6 feet). It is a critical piece of Montreal's transportation infrastructure, a genuine achievement in subaquatic construction. My last trip through, I observed the distinct resonance of traffic, a constant hum that speaks to its ceaseless utility for the city.

One ponders the sheer audacity of connecting disparate landmasses this way. This immersed tube, named for the pivotal 19th-century Lower Canada political reformer Louis-Hippolyte Lafontaine, fundamentally re-shapes urban transit. It forms a vital circulatory artery between Montreal Island and the South Shore, a testament to our drive for seamless passage.

Lafontaine Tunnel: A Deeper Dive

• Named After Louis-Hippolyte Lafontaine: His legacy as a champion for responsible government in Lower Canada certainly resonates with the tunnel's role in connecting communities and fostering economic activity. A name for a structure that facilitates progress.
• Immersed Tube Construction Method: This isn't a traditional drilled tunnel. Engineers prefabricated massive concrete sections on land, then precisely floated them into position. These segments were meticulously submerged into a pre-dredged trench on the riverbed and joined, forming a watertight seal. This method reduces construction time in situ and ensures structural integrity.
• Strategic Location: Located beneath the Saint Lawrence River, it bridges the eastern part of Montreal Island with Longueuil on the South Shore. It is an integral component of Autoroute 25 (A-25), a major expressway.
• Economic and Commuter Lifeline: The tunnel serves as more than just a road segment. It functions as an indispensable conduit for tens of thousands of daily commuters and substantial commercial freight. Its absence would create an unimaginable logistical bottleneck for eastern Montreal. My commute often relies on A-25, so I experience this impact directly.
• Ongoing Refurbishment Project: As of 2024, the tunnel and its intricate network of access roadways are undergoing an extensive, multi-year rehabilitation. This significant $2.5 billion investment project commenced around 2020 and continues until 2025. The work involves structural repairs, ventilation system upgrades, and complete roadway resurfacing. It's a massive undertaking, but absolutely vital for the tunnel's long-term operational viability.
• Daily Traffic Volume: This structure handles well over 100,000 vehicles every day. Imagine the continuous flow, the sheer volume of human movement and commerce, channeled through a facility designed and built decades ago. It's a testament to its enduring design.