|tunnel = building_passage|
|A passage through a building, normally as an archway or overhang|
|Used on these elements|
|Tools for this tag|
- the building and the way should have shared nodes at the entry and exit points of the building.
- the way is split at the entry and exit nodes and only the part covered by the building is tagged with tunnel=building_passage.
- the layer should be the same as the layer of the building, with the above mentioned exception when several tunnels are passing on different levels. So if the building doesn't have a layer tag, the way should not have one either.
- Do not use tunnel=building_passage and covered=yes at the same time.
When building_passage should not be used: It is not meant to be used for indoor mapping. The walls at both sides (and the top) of the tunnel are considered outer walls of the building, which can have entrances that lead into it (This proposal doesn't cover entrances inside building passages). For indoor mapping highway=corridor or indoor=yes can be used. It is also not meant for ways that go through something else than a building.