Key:construction

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Public-images-osm logo.svg construction
12Jan05 04.jpg
Description
The construction tag may be used for any road or railway under construction.
Group: Highway
Used on these elements
should not be used on nodes
may be used on ways
may be used on areas
use on relations unspecified
Useful combination
Status: Unspecified

Major road and rail construction schemes typically take well in excess of a few years to complete. We may therefore wish to show schemes under construction on the map. Many commercial mapping companies also show roads under construction and planned (see Key:proposed) roads.

Usage - general notes

A highway=construction tag or railway=construction is necessary for any of the construction values to render.

For building sites, the tag landuse=construction should be used instead. Another option is to set the tag construction=yes. This allows to use "construction" much more universal for any kind of main keys without need to change the main key.

Values

Values of construction=* can be all values from highway=*, railway=*, waterway=* and landuse=*.

Additionally construction=minor can be used for existing highways which will be modified or repaired without being closed. In this case we don't set highway=construction but leave it at its default value.

Example-values for highways under construction

highway=construction will render on the default Mapnik layer at zoom level 12) and above if used in conjunction with any of the following;

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

In all cases, the tag will render as a dashed version of the corresponding <highway=.....> tag. See the highway tag for a full description of the rendering style.

In case of repaired roads or roads under construction, which opening is expected in the nearest future, tags opening_date=* and check_date=* should be used. opening_date - date, when opening is expected; check_date - date, when information about expected opening date and about fact of closing road is actual.

Format: <tag k="opening_date" v="YYYY-MM-DD"/>, <tag k="check_date" v="YYYY-MM-DD"/>

Example-values for railways under construction

railway=construction will render on Osmarender at zoom levels 14 and above if used in conjunction with any of the following;

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

In all cases, the tag will render as a dashed version of the corresponding <railway=.....> tag. See the railway=* tag for a full description of the rendering style.

Notes

It might be tough to get detailed GPS tracks of roads which have not yet opened to the public, but it'll usually be possible to gather a few points along the route, and the route probably doesn't need to be massively detailed. We might miss several schemes - but then again - so do most commerical mapping organisations.

  • No text is currently rendered on Osmarender, but this may be fixed later.

See Also

Common Tagging Mistakes

leisure=construction - If you know places with this tag, consider retagging it with a more appropriate tag!