Tag:highway=proposed
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 highway = proposed
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A road that is about to be built, but where any construction work hasn't yet been started. 
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| Group: highways |
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| Status: in use |
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For roads that are scheduled to be built, but where any construction work hasn't yet been started.
Used in the same way as highway=construction; that is, you set highway=proposed together with anything between proposed=motorway through proposed=footway to proposed=motorway_junction.
See proposed=* for more guidance.
In case of mapping it - always include sources confirming that it is actually a serious project and that such road geometry was selected.
Planned roads are not objects that can be seen on the ground, so the source of the data must be specified each time. This can be the source=* tag on the object or in the changeset.
 | Note that generally, OpenStreetMap requires information to be verifiable on the ground. Proposed features that are not visible on the ground should therefore only be mapped in exceptional cases and after a discussion with the relevant OSM community, lest they might be deleted for lack of verifiability. |
It is perfectly fine to delete highway=proposed where it is not verifiable that roads are to be built.
Common problem with highway=proposed road is tagging roads that are certainly not "about to be built". On picture (faint line from top-left to bottom-right) - http://www.openstreetmap.org/way/290450974/history across Bering Strait- see Bering Strait crossing on Wikipedia