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Public-images-osm logo.svg construction
The T12 link road to Wilmore Road under construction - - 4452080.jpg
Esta clave se usa junto con las etiquetas de nivel superior building/highway/railway/landuse=construction para describir el tipo de característica que se encuentra en construcción. Show/edit corresponding data item.
Grupo: ciclo vital
Usado en estos elementos
puede ser usado en nodospuede ser usado en víaspuede ser usado en áreasno puede ser usado en relaciones
Combinaciones útiles
Véase también
Estado: de facto


Help (89606) - The Noun Project.svg

This key is used together with the higher-level tags building=construction, highway=construction, landuse=construction or railway=construction to describe the type of the feature which is currently under construction. For other higher-level tags, e.g. leisure=*, please use a lifecycle prefix instead: construction:leisure=playground.

Major road and rail construction schemes typically several years to complete. Use this key to denote active construction sites (for projects being planned, where there is little or no evidence for them on the ground, use proposed=* instead).


Use in well defined combinations of building=construction, highway=construction, landuse=construction or railway=construction + construction=value. The value of the construction=* key should be one of those defined bellow and indicates the type of feature being built (you can use any value from from highway=*, railway=* and building=*). For example: highway=construction+construction=primary describes a highway which is under construction and its type after the construction has finished will be primary.

A deprecated option is to set the tag construction=yes. While this allows you to tag just about any feature as being "under construction", it won't be supported by the map renderers and other data consumers, and is therefore not recommended. A lifecycle prefix is usually the preferable alternative for such features.

If you know the date at which a construction site is expected to be completed, you can tag it with opening_date=*. Additionally, you can use check_date=* to denote when you last checked/updated the values (this can be useful as large construction projects are often delayed).

For instance, to tag a residential road under construction, use highway=construction and construction=residential. To tag a tramway under construction, use railway=construction and construction=tram.


In addition to using highway=construction, you should also tag the type of highway being built by using construction=*. For instance, to mark a primary road under construction, tag it with highway=construction and construction=primary.

For minor road-works (where the road in question remains open), use construction=minor (and don't use highway=construction, but leave it at its default value).


highway=construction with any of the following values for construction=* will render on the default Mapnik layer at zoom level 12 and above:

Value Element Comment Rendering
motorway vía Motorway under construction Highway-construction.png
motorway_link vía Motorway sliproad under construction  
trunk vía Important non-motorway road under construction  
trunk_link vía Sliproad to an important non-motorway road under construction  
primary vía Primary road under construction Primary-construction.png
primary_link vía Sliproad to a primary road under construction  
secondary vía Secondary road under construction Secondary-construction.png
tertiary vía Tertiary road under construction Tertiary-construction.png
unclassified vía Unclassified road under construction (alternatively tag construction=minor) Construction unclassified.png
residential vía Residential road under construction Residential-construction.png
pedestrian vía Pedestrianised road under construction  
service vía Service road under construction  
track vía Track under construction  
bridleway vía Bridleway under construction  
cycleway vía Cycleway under construction  
footway vía Foot path under construction (alternative tag <construction=footpath>)  
steps vía Steps under construction  

In all cases, the way will be rendered as a dashed version of the corresponding highway=* tag.


Similarly to highways above, tag the railway under construction with railway=construction and the type of railway being built with construction=*. The following values for construction=* will render on Osmarender at zoom levels 14 and above:

Value Element Comment Example
rail vía Standard gauge railway under construction Construction rail.png
narrow_gauge vía Narrow gauge railway under construction  
light_rail vía Light-railway under construction  
tram vía Tramway under construction  
preserved vía Preserved railway under construction e.g. for steam trains  
subway vía Subway under construction Consturction subway.png
monorail vía Monorail under construction  

In all cases, the way will be rendered as a dashed version of the corresponding railway=* tag.


Since most construction sites are not accessible to the public, it might be tough to get detailed GPS tracks of roads which have not yet been built. In that case, it's usually sufficient to roughly trace the route, and increase the detail level once the road is open.

See Also

  • proposed=*, for features which are being planned, but for which construction has not yet started.