As of March 31, 2022, around 22 percent of inspected road tunnels in Japan were built 51 and more years ago, constituting the building age with the largest share. Overall, the number of inspected tunnels in Japan amounted to approximately 10.99 thousand.
Distribution of inspected road tunnels in Japan as of March 2022, by building age
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Share of inspected tunnels
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MLIT (Japan). (September 16, 2022). Distribution of inspected road tunnels in Japan as of March 2022, by building age [Graph]. In Statista. Retrieved July 21, 2024, from https://www.statista.com/statistics/1231327/japan-inspected-road-tunnels-share-by-age/
MLIT (Japan). "Distribution of inspected road tunnels in Japan as of March 2022, by building age." Chart. September 16, 2022. Statista. Accessed July 21, 2024. https://www.statista.com/statistics/1231327/japan-inspected-road-tunnels-share-by-age/
MLIT (Japan). (2022). Distribution of inspected road tunnels in Japan as of March 2022, by building age. Statista. Statista Inc.. Accessed: July 21, 2024. https://www.statista.com/statistics/1231327/japan-inspected-road-tunnels-share-by-age/
MLIT (Japan). "Distribution of Inspected Road Tunnels in Japan as of March 2022, by Building Age." Statista, Statista Inc., 16 Sep 2022, https://www.statista.com/statistics/1231327/japan-inspected-road-tunnels-share-by-age/
MLIT (Japan), Distribution of inspected road tunnels in Japan as of March 2022, by building age Statista, https://www.statista.com/statistics/1231327/japan-inspected-road-tunnels-share-by-age/ (last visited July 21, 2024)
Distribution of inspected road tunnels in Japan as of March 2022, by building age [Graph], MLIT (Japan), September 16, 2022. [Online]. Available: https://www.statista.com/statistics/1231327/japan-inspected-road-tunnels-share-by-age/