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A numbered board beside the track.
Also known as: Speed restriction board Japan
States the permitted speed over a length of Japanese track, marked at its start and its end.
States the maximum speed over the length of track it begins.
Contexts: Public information
Gives the figure in kilometres per hour and marks the end of the restriction with a differently shaped board, so a driver knows where the restriction lifts without counting distance; the pair is what makes the restriction a length rather than a point.
Contexts: Public information
An upright board on a post beside the track carrying one or two numerals, with a second board of a different outline marking the end of the length.