Tag:tunnel=culvert
 tunnel = culvert
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| Description |
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For a stream/drain/ditch passing under a road. Use it on the section of waterway passing under the road. 
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| Group: Waterways |
| Used on these elements |
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| Useful combination |
| Status: de facto |
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| Tools for this tag |
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| Wikidata |
| Q4168092 |
A culvert is a device used to channel water. It may be used to allow water to pass underneath a road, railway, or embankment for example. Culverts can be made of many different materials; steel, polyvinyl chloride (PVC) and concrete are the most common. Formerly, construction of stone culverts was common.
Commonly used with waterway=stream, waterway=drain, waterway=ditch.
You may use tunnel=flooded to map larger and longer tunnels used to channelise any fluid.
Typical culvert is a pipe buried under the road. Very large culverts may be hard to distinguish from bridges.
How to Map
Apply to the section of covered waterway. Use the tag layer=* as usual for tunnels.
See tunnel=* for a description of the preferred way of connecting culvert waterways to adjoining waterway sections.
Possible tagging mistakes
- culvert=yes ‒ The culvert=yes syntax is deprecated (since 2010) due to ambiguity.[1] Please use tunnel=culvert instead. (While technically sound there is no use of culvert=no as of April, 2015, so avoid it altogether.)
Automated edits are strongly discouraged unless you really know what you are doing!
See also
- Culvert on Wikipedia
- Water feature#Navigations
- Different types of culverts (Cornell University)
- The discussion page for details of an earlier OSM tagging system, culvert=yes.
References
- ↑ See the seemingly endless debate over the mailing list