Relation:bridge
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 bridge
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| Description |
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relation used to link the various elements needed to map large or complex bridges 
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| Group: Bridges |
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| Implies |
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layer=≥1 |
| See also |
Status: proposed
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| Tools for this tag |
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The bridge relation is used to group the various objects that combine to accurately map the functions and structures of a bridge.
Adding a man_made=bridge tag for this relationship is inappropriate, rather, this tag should only be given to the bridge's outline (which must be a member with the role outline of this relation).
Functionally, this relation does not add any new information for typical bridges, it only duplicates the existing ones. All information it may contain can almost always be added per area by adding them along with the man_made=bridge tag.
Suggested tags
| Tag | Value | Description |
|---|---|---|
| type | bridge/tunnel | Identifies a relationship as representing a bridge or tunnel. |
| layer | layer number | If omitted, assume 1 for a bridge and -1 for a tunnel; sometimes a bridge crosses above or runs beneath another bridge, so 2 may be needed. |
| name | name |  |
| ref | reference identifier |  |
| height | height (in meters) |  |
| length | length (in meters) | The length of the bridge as measured between its outermost supports. |
| operator | entity name | The entity responsible for the bridge's use, safety and/or maintenance (e.g. "Network Rail"). |