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Public-images-osm logo.svg man_made = bridge
The outline of a bridge, grouping together all features for that bridge. Edit or translate this description.
Rendering in OSM Carto
Rendering-man made bridge.png
Group: Man made
Used on these elements
should not be used on nodesshould not be used on waysmay be used on areasshould not be used on relations
Useful combination
See also
Status: approvedPage for proposal


The tag man_made=bridge is used to tag a bridge defined by the outline of the bridge. It is suitable to group together all ways running over that bridge and for holding descriptive tags for that bridge (the object represents the bridge as a whole) and to mark shape of the bridge construction.

How to map

Draw the outline of the bridge as area area and apply man_made=bridge and layer=* to it. The outline should encompass the continuous structure of the bridge. Cables and pylons beside the bridge are tagged with bridge:support=*.

Add the name of the bridge to the bridge outline (name=*) and the name of the roads to the road way ways running over the bridge. Attributes of the bridge itself should be added to the outline.

Ways across the bridge should be tagged with the same values of layer=* as the outline.

The key bridge=* can be used to indicate the type of the bridge, in which case its value set it should match bridge=* tagged on ways.

Where the ways cross the outline they should be connected to it with a shared node. Do not connect the way ways running under the bridge to the outline.

Some mappers add covered=yes to segments of highway=* which pass under the man_made=bridge outline, but this is controversial.

Delimiting a bridge

Ideally, each end of the bridge should correspond to the point where the bridge's abutment ends and an opening begins below the bridge. This point is clearest in street-level imagery. In aerial imagery, an expansion joint may appear as a thin line running across a road bridge's pavement at the point where you should begin or end the bridge. Parts of the bridge's structure, such as a guardrail or approach slab, may extend beyond this point but are not included in the bridge area. A bridge may have a different surface than the adjoining roadway, for example a wooden pedestrian bridge, making it easier to determine the shape of the bridge. However, a concrete bridge along an otherwise asphalt-paved road may also have a concrete approach slab, so look for an expansion joint if there is one.

Bridges with more than one level

The same as before but the key layer=* should now contain the lowest number of all the features on the bridge. To group together all features of the bridge the proposed relation bridge is now used and the outline tagged with man_made=bridge is added as outline-member to that Relation of the bridge itself should be added to the relation.

A new (alternative) proposal to map multi-level bridges using level=* and location=bridge is described in Proposed features/Simplify man made=bridge mapping#Multi-level bridges

Objects and features on bridges

See proposal objects on bridges for tagging with bridge=* or location=bridge and proposal Relations/Proposed/Bridges_and_Tunnels for using bridge relations.


One or more ways, one level

Man made bridge 0.jpg

A bridge represented by only one OSM way, the outline is not drawn yet. The way itself is tagged with bridge=yes and layer=1. Draw the outline.

Man made bridge 1.jpg

A bridge represented by two OSM ways, both of them at the same level. The ways are tagged with bridge=yes and layer=1. The outline is drawn and tagged with man_made=bridge and layer=1. The OSM ways are connected to the outline.

If the bridge has a specific name it would be added to the outline.

Multiple ways, two levels

Man made bridge 2.jpg

A large bridge with two carriage ways and a cycleway running below those. For better visibility only a part of the bridge is shown and the outline is displayed as a red-dashed line.

The OSM ways of the roads are tagged with bridge=yes and layer=2. The cycleway is tagged with bridge=yes and layer=1. The outline is drawn and tagged with man_made=bridge and layer=1. The proposed relation bridge is used to combine all features together and the OSM way of the outline is added as the outline-member to the relation.

The name of the bridge would be added to the relation.

See also