|usage = military|
|Specifies that a railway is a military line: tracks for military use, mainly in military areas, munitions storage areas or connections from these to the public railroad network.|
|Used on these elements|
|Status: in use|
|Tools for this tag|
The tag usage=military is used together with railway=* to map an industrial line: railway tracks for military use, mainly in military areas and munitions storage areas, or connections from these to the public railroad network.
See service=* to tag a siding, yard tracks, crossover or overtaking tracks.
Other values of usage=*:
|usage=main||Main line, presumably heavy traffic, often double tracked and/or electrified, may be high speed.|
|usage=branch||Branch line, less traffic and lower speed than main lines, often single tracked and/or not electrified, may be constructed to lower specifications than main line. May connect a place to a mainline or serve to connect mainlines, typically a few dozen miles in length.|
|usage=industrial||Tracks in private use that serve only freight transport inside ports, industrial complexes or mining areas, and for connecting these to the public network|
|usage=test||Tracks used for testing of new vehicles or new rail transport technologies.|
|usage=tourism||Tracks for tourists, around museums, historic or "heritage" trains, often only on weekends and holidays and/or seasonally, most preserved railways (railway=preserved and railway:preserved=yes)|