Do you know how long the world's longest highway tunnel is? And what are the top 10 longest highway tunnels in the world? Currently, there is no unified official authoritative list providing a complete ranking of global highway tunnel lengths. However, we have compiled a list of the top 10 longest highway tunnels in the world to help you understand the world's longest highway tunnels.

  1. Lærdal Tunnel, Norway: Length: 24.51 km, Completed: 2000, Features: Currently the world's longest highway tunnel, connecting Lærdal and Aurland, traversing the western mountains of Norway.

   2. WestConnex Tunnel, Sydney, Australia: Length: 22.4 km, Completed: 2023, Features: Australia's longest road tunnel, including the M4 and M8 tunnels.

  3. Tianshan Victory Tunnel, Xinjiang, China: Length: 22.13 km, Completed: December 30, 2024. Features: Over 3000 meters above sea level, traverses 16 geological fault zones, maximum burial depth 1200 meters, 4 vertical shafts, the deepest reaching 706 meters (equivalent to a 250-story building), setting a world record for the deepest vertical shaft in a high-speed tunnel.

   4. Yamate Tunnel, Tokyo, Japan: Length: 18.2 km, Completed: 2015. Features: Japan's longest highway tunnel, traversing densely populated areas of Tokyo, intersecting with 13 railway lines, making construction extremely difficult. The tunnel employed innovative construction methods such as the "U-shaped bend method" and "tunnel widening method," saving approximately 15 billion yen.

   5. Qinling Zhongnanshan Highway Tunnel, Shaanxi, China: Length: 18.02 km, Completed: 2007. Features: The world's longest twin-bore highway tunnel, each bore is 18.02 km long, for a total length of 36.04 km. 6. Jinpingshan Tunnel, Sichuan, China: Length: Approximately 17.5 km; Completed: 2008; Features: The world's second deepest buried tunnel, with a maximum depth of 2375 meters and 73.1% of the section exceeding 1500 meters in depth.

   7. Gotthard Road Tunnel, Switzerland: Length: 16.9 km; Completed: 1980; Features: Traverses the high mountains of central Switzerland and is a major north-south transportation route in Europe.

   8. Qinling Tiantaishan Tunnel, Shaanxi, China: Length: 15.56 km; Completed: December 2020; Features: Maximum depth of 973 meters, clear width of 14 meters, clear height of 5 meters, designed speed of 80 km/h, single-bore three-lane tunnel.

  9. Muzhailing Tunnel, Gansu, China: Length: 15.226 km, Completed: January 31, 2024. Features: Traverses 6 folds, 12 major faults, and weak carbonaceous slate strata, with extremely complex geological conditions, high stress concentration, and a high risk of large deformations. Experts have called it "a rare global challenge in tunnel construction history."

   10. Ryfylke Tunnel, Norway: Length: 14.5 km, Completed: 2019. Features: The world's longest undersea highway tunnel, with its deepest point at 292 meters below sea level, setting a record for the deepest undersea highway tunnel.

   Super Tunnels Under Construction:

   The Rogaland Tunnel in Norway, planned length: 26.7 km, expected completion: 2027. Features: Traverses the Bokenfjord, with its deepest point at 392 meters below sea level, setting a new record for the deepest undersea highway tunnel and surpassing the Lodal Tunnel to become the world's longest highway tunnel.

   Currently, there are approximately 30 highway tunnels longer than 10 km completed worldwide, mainly located in the European Alps, the western mountainous regions of China, and Japan. These engineering marvels not only shorten travel time but also overcome the challenges of complex terrain, becoming key nodes in modern transportation networks. It is worth noting that with the completion of the Tianshan Victory Tunnel and the construction of the Rogaland Tunnel, the global ranking of highway tunnel lengths will be updated in the coming years.