Specifies tracks within railway company operated railway yards.
This tag is used for the tracks at yard stations which are operated by the railway company itself (in difference to spur tracks).
How to map
Add the tag service=yard to a way that is also tagged with railway=*
Optionally add ref=*
Example:
Some yards have visible index numbers/letters to allow workers to easily identify lines (some yards have dozens of parallel lines, very close together. making this indexing important)
A line within the yard should selected as the "main route", and the service tag should not be applied to it. This is to allow renderers to show the track at a higher zoom, and so that yards which are connected to a main line at both ends may be rendered unbroken[1].
Yard area
The area that contains the yard should be tagged with landuse=railway and railway=yard if the yard services vehicles.