|The proposed tag may be used for any road, railway or route that is in planning phase.
|Used on these elements
|Status: in use
|Tools for this tag
Major road and rail planning schemes typically take years until actual construction begins. We may therefore wish to show planned roads, railways, routes (airports, other features...) on the map. Some commercial mapping companies also show planned features. This key can be used for any feature that is still in planning phase but construction hasn't yet started. For features under construction use construction=* instead.
How to tag in general
The way to tag planned features is to use the main tag (Key, e.g. highway, railway, amenity, aeroway, ...) and add proposed as value. Then you create another tag proposed=* with x being the <value you usually would put on the main tag>.
You are also encouraged to add the source for the plan with source=*. Please take care about copyright issues and don't copy from plans you're not entitled to do so.
Objects without clear evidence that there is some real active plan to construct it should be removed from data.
Values of proposed
Values of proposed=* can be all values usually used for the key where you inserted proposed as value (see above). Please keep in mind that cluttering the editors will cause problems (payload, clutter) to the other mappers, so don't exaggerate with proposed features.
Example-values for proposed highways
|proposed motorway sliproad
|proposed important non-motorway road
|proposed sliproad to an important non-motorway road
|proposed primary road
|proposed sliproad to a primary road
|proposed secondary road
|proposed tertiary road
|proposed unclassified road
|proposed residential road
|proposed pedestrianised road
|proposed service road
|proposed foot path
For roads to be removed, use proposed:highway=no.
Example-values for proposed railways
|proposed standard gauge railway
|proposed narrow gauge railway
|proposed preserved railway
Note that mapping proposed features is problematic, controversial and only real plans should be mapped, if at all.
For more specific description of the planning phase it would be necessary to invent an additional tag, because not all plans are realized, hence describing the probability for a proposed project to be realized. Please add documentation here in the future.
- a further tag could be added to illustrate the expected beginning of construction and planned opening date.
This is frequently used to describe projects that are abandoned, planned to start in a distant future and ones that are de facto fictional. See https://github.com/gravitystorm/openstreetmap-carto/issues/908 for examples.