Tag:man_made=tunnel
 man_made = tunnel
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| Description |
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Indicate the outline of a tunnel and group together all features for that tunnel 
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| Group: man made |
| Used on these elements |
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| Useful combination |
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Status: in use
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| Tools for this tag |
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The tag man_made=tunnel is used to tag a tunnel, defined by the outline of the tunnel. It is suitable to group together all ways running into the tunnel and for holding descriptive tags for that tunnel (the object represents the tunnel as a whole).
Current status
Although a proposal exists, it never went past the draft stage. Nonetheless, there is a constant increase use of this tag, and has gotten official iD support in May 2019[1] but as of Sep 2024 isn't universally supported either (e.g. JOSM lacks the corresponding rendering and templates).
How to tag
(Note that this description is based on man_made=bridge but is intentionally lacking details due to the aforementioned lack of official acceptance.)
Draw an outline of the tunnel as an 
area and apply man_made=tunnel and layer=* to it. The outline should encompass the continuous structure of the tunnel.
Additional tags on the man_made=tunnel outline:
name=*– name of the tunnellayer=*– to describe the vertical relationship with surrounding features
Ways in and on the tunnel:
- Connect the road
ways running into the tunnel to the man_made=tunneloutline where the ways cross the outline. Mark these ways withtunnel=*. - Do not connect the ways above the tunnel to the outline.
References
See also
tunnel=*for ways inside a tunnelman_made=bridgefor the equivalent of above ground structures- Drafted proposal for man_made=tunnel
- Proposed relation for bridges and tunnels
- Indoor Mapping which may overlap with tunnels, underground complexes in particular