The tag as proposed leaves much to interpretations. But there are a bunch of things one can say about a road that are crisp and clear:
covered_at_high_tide not_plowed_in_winter not_maintained_by_government passing_requires_reversing But at some point you break down into prose and write note='Road maintained by local 4WD club, passes over sandy inlet that floods at high tide, four inch rocks placed by club restrict access to high clearance vehicles, see website for details.'
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