Hello.
Proposed features really shouldn't go into OSM. OSM is a map about what's in the world NOW, not how it's going to be at some point in indeterminate future.
What's the use of having non-existing features on the map? Once the project starts and they start digging, I can see the map getting updated as it progresses. But having the whole thing there while it's going to take 5, 10, 20 years to complete is unnecessary map clutter.
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            Published using OSMCha: https://osmcha.org/changesets/137242930
            