As of March 31, 2022, tunnels with a standard lining added up to approximately 3.3 thousand kilometers in length. The term tunnel refers only to structures that have been built for passing through natural obstacles like mountainsides, plateaus, the underground, river bottoms, et cetera. Consequently, the statistic does not include underground crosswalks, box culverts, rock or snow sheds, and similar.
Length of road tunnels in Japan as of March 2022, by interior
(in kilometers)
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MLIT (Japan). (March 22, 2024). Length of road tunnels in Japan as of March 2022, by interior (in kilometers) [Graph]. In Statista. Retrieved October 30, 2024, from https://www.statista.com/statistics/1229125/japan-tunnel-length-by-interior/
MLIT (Japan). "Length of road tunnels in Japan as of March 2022, by interior (in kilometers)." Chart. March 22, 2024. Statista. Accessed October 30, 2024. https://www.statista.com/statistics/1229125/japan-tunnel-length-by-interior/
MLIT (Japan). (2024). Length of road tunnels in Japan as of March 2022, by interior (in kilometers). Statista. Statista Inc.. Accessed: October 30, 2024. https://www.statista.com/statistics/1229125/japan-tunnel-length-by-interior/
MLIT (Japan). "Length of Road Tunnels in Japan as of March 2022, by Interior (in Kilometers)." Statista, Statista Inc., 22 Mar 2024, https://www.statista.com/statistics/1229125/japan-tunnel-length-by-interior/
MLIT (Japan), Length of road tunnels in Japan as of March 2022, by interior (in kilometers) Statista, https://www.statista.com/statistics/1229125/japan-tunnel-length-by-interior/ (last visited October 30, 2024)
Length of road tunnels in Japan as of March 2022, by interior (in kilometers) [Graph], MLIT (Japan), March 22, 2024. [Online]. Available: https://www.statista.com/statistics/1229125/japan-tunnel-length-by-interior/