Doubt 'disused is correct, as it is still being used, although for a tourist train, see "A section of railway which is no longer used but where the track and infrastructure remains in place. The track is likely overgrown with endemic vegetation, but could be brought back into useful service with only minor effort." : this track is not overgrown, the sleepers have been inspected, any decayed sleepers have been replaced, and it is in regular although not frequent use. 