[Tagging] Data redundancy with "ref" tag on ways vs relations

[Richard Mann]

Bridge ref & highway ref: bridge ref should have a specific tag, such as
bridge:ref=whatever

Two roads meet at roundabouts: roundabout has higher-ranking (ie lower)
number, unless the higher-ranking road has a flyover or underpass. Or don't
have a ref.

None of the issues raised justify changing a very well established scheme.

Richard
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