The Hida Tunnel is part of the Tokai-Hokuriku Expressway that runs across the central part of Japan.
Hida Tunnel (length: 10.7 km) with the maximum overburden of 1040 m is the second longest road tunnel in Japan.
This Hida Tunnel construction greatly contributes to the development of mountain tunnel technology in the future.
TBM was adopted in tunnel excavation. The diameter of the TBM was 12.84 m, which was one of the largest in the world.