As of March 31, 2020, approximately 372.24 thousand kilometers of unimproved roads in Japan had a width less than 3.5 meters, representing the overwhelming majority among roads not in line with the standard for road improvements. The standard refers to qualitative criteria (width, alignment, inclination, visibility, etc.) as stipulated by the Ordinance on Road Structure designated roads are required to meet. Standard-improved and unimproved roads add up to the actual length of the network, amounting to roughly 1.23 million kilometers.
Length of unimproved roads in Japan in 2020, by road width
(in 1,000 kilometers)
*According to the source, 'standard-improved' means that the quality of roads, such as width, alignment, inclination, and visibility, is improved to meet the standard stipulated by the Ordinance on Road Structure.
Figures are 'real lengths'. According to the source, real length of roads refers to the length of roads minus duplicate length (duplicate sections), length not in service (sections for which no notification of commencement of service has been provided) and water length (sections on the sea, rivers, lakes or marshes where ferrying services are available).
The source does not provide an exact publication date. The date mentioned here is the day of data access.
Values have been rounded.
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MLIT (Japan). (February 4, 2022). Length of unimproved roads in Japan in 2020, by road width (in 1,000 kilometers) [Graph]. In Statista. Retrieved October 02, 2024, from https://www.statista.com/statistics/1250039/japan-unimproved-road-length-by-width/
MLIT (Japan). "Length of unimproved roads in Japan in 2020, by road width (in 1,000 kilometers)." Chart. February 4, 2022. Statista. Accessed October 02, 2024. https://www.statista.com/statistics/1250039/japan-unimproved-road-length-by-width/
MLIT (Japan). (2022). Length of unimproved roads in Japan in 2020, by road width (in 1,000 kilometers). Statista. Statista Inc.. Accessed: October 02, 2024. https://www.statista.com/statistics/1250039/japan-unimproved-road-length-by-width/
MLIT (Japan). "Length of Unimproved Roads in Japan in 2020, by Road Width (in 1,000 Kilometers)." Statista, Statista Inc., 4 Feb 2022, https://www.statista.com/statistics/1250039/japan-unimproved-road-length-by-width/
MLIT (Japan), Length of unimproved roads in Japan in 2020, by road width (in 1,000 kilometers) Statista, https://www.statista.com/statistics/1250039/japan-unimproved-road-length-by-width/ (last visited October 02, 2024)
Length of unimproved roads in Japan in 2020, by road width (in 1,000 kilometers) [Graph], MLIT (Japan), February 4, 2022. [Online]. Available: https://www.statista.com/statistics/1250039/japan-unimproved-road-length-by-width/
