Key:proposed

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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.

In many cases it may be preferable to use a lifecycle prefix such as proposed:leisure=playground.

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

Used with highway=proposed.

Value	Element	Comment	Example
motorway		proposed motorway
motorway_link		proposed motorway sliproad
trunk		proposed important non-motorway road
trunk_link		proposed sliproad to an important non-motorway road
primary		proposed primary road
primary_link		proposed sliproad to a primary road
secondary		proposed secondary road
tertiary		proposed tertiary road
unclassified		proposed unclassified road
residential		proposed residential road
pedestrian		proposed pedestrianised road
service		proposed service road
track		proposed track
bridleway		proposed bridleway
cycleway		proposed cycleway
footway		proposed foot path
steps		proposed steps

For roads to be removed, use proposed:highway=no.

The way could be rendered as a modified (dashed, dotted, etc.) version of the corresponding highway=* tag. See the highway tag for a full description of the rendering style.

Example-values for proposed railways

railway=proposed is currently rendered on OSM Humanitarian and OpenRailwayMap, but not on the standard map.

Value	Element	Comment	Example
rail		proposed standard gauge railway
narrow_gauge		proposed narrow gauge railway
light_rail		proposed light-railway
tram		proposed tramway
preserved		proposed preserved railway
subway		proposed subway
monorail		proposed monorail

The way will usually render as a modified version (dashed, dotted, etc.) of the corresponding railway=* tag. See the railway=* tag for a full description of the rendering style.

For instance, to tag a proposed tramway, use railway=proposed + proposed=tram In addition proposed:railway=tram may be also added.

Note that mapping proposed features is problematic, controversial and only real plans should be mapped, if at all.

Planning Phases

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.

Future considerations

• a further tag could be added to illustrate the expected beginning of construction and planned opening date.

e.g. construction_start_expected=YYYY-MM-DD construction_end_expected=YYYY-MM-DD

Problems

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.