As of March 31, 2023, around 0.3 percent of road tunnels in Japan were in a critical condition that required immediate action to restore the structural integrity. In the course of eight years, approximately 11.11 thousand tunnels received a close visual inspection.
Distribution of inspection results of road tunnel conditions in Japan as of March 2023
not including facilities under inspection as of March 31, 2023; classification after close visual inspection into stages*
Supplementary notes
*Stage I: Good. No structural deficiency. Stage II: Preventive maintenance. Preventive maintenance is desirable, although no structural deficiency is found. Stage III: Early rehabilitation. The structure needs early rehabilitation, or it can become deficient. Stage IV: Emergency rehabilitation. The structure needs emergency rehabilitation because it is deficient or it will most likely become deficient.
Percentages may not total 100 due to rounding by the source.
Profit from the additional features of your individual account
Currently, you are using a shared account. To use individual functions (e.g., mark statistics as favourites, set
statistic alerts) please log in with your personal account.
If you are an admin, please authenticate by logging in again.
Learn more about how Statista can support your business.
MLIT (Japan). (August 23, 2023). Distribution of inspection results of road tunnel conditions in Japan as of March 2023 [Graph]. In Statista. Retrieved December 30, 2024, from https://www.statista.com/statistics/1231348/japan-share-road-tunnel-conditions/
MLIT (Japan). "Distribution of inspection results of road tunnel conditions in Japan as of March 2023." Chart. August 23, 2023. Statista. Accessed December 30, 2024. https://www.statista.com/statistics/1231348/japan-share-road-tunnel-conditions/
MLIT (Japan). (2023). Distribution of inspection results of road tunnel conditions in Japan as of March 2023. Statista. Statista Inc.. Accessed: December 30, 2024. https://www.statista.com/statistics/1231348/japan-share-road-tunnel-conditions/
MLIT (Japan). "Distribution of Inspection Results of Road Tunnel Conditions in Japan as of March 2023." Statista, Statista Inc., 23 Aug 2023, https://www.statista.com/statistics/1231348/japan-share-road-tunnel-conditions/
MLIT (Japan), Distribution of inspection results of road tunnel conditions in Japan as of March 2023 Statista, https://www.statista.com/statistics/1231348/japan-share-road-tunnel-conditions/ (last visited December 30, 2024)
Distribution of inspection results of road tunnel conditions in Japan as of March 2023 [Graph], MLIT (Japan), August 23, 2023. [Online]. Available: https://www.statista.com/statistics/1231348/japan-share-road-tunnel-conditions/
