Maintenance rate of roads in Japan 2019, by type

Maintenance rate of roads in Japan as of March 2019, by road type

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Release date

April 2021



Survey time period

March 31, 2019

Special properties

excluding national expressways

Supplementary notes

The maintenance rate is calculated by dividing the maintained road length by the real road length. Moreover, the maintained road length is calculated by subtracting the length of road sections with a congestion degree of one or higher from standard-improved roads (only including roads with a roadway width of 5.5 meters and more).
In case of municipal roads, the maintained road length is equivalent to the length of standard-improved roads of 5.5 meters width and more.
Standard-improved roads are those complying with structural requirements defined by Japanese regulations. The degree of congestion is determined by dividing the yearly measured traffic volume by the traffic capacity as estimated in the 'Road Census' every five years.

The source does not provide an exact publication date. The date mentioned here is the day of data access.

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Statistics on "Road infrastructure in Japan"

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