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Public-images-osm logo.svg usage = main
Krakow Nowa Huta Polnoc train station, Splawy street, Nowa Huta, Krakow, Poland.jpg
Specifies that a railway is a main line, presumably heavy traffic, often double tracked and/or electrified, may be high speed. Show/edit corresponding data item.
Group: properties
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasshould not be used on relations (except multipolygon relations)
See also
Status: de facto

The tag usage=main is used together with railway=* to map a main line: a railway with higher traffic and higher speed than branch lines, often double tracked and/or electrified, may be high speed, usually longer than a branch line.

Often, main lines are described as such in the official name, however, sometimes rail is named "XYZ Main Line" even though it is more appropriately tagged usage=branch.

This tag can be used for several kinds of railway, but it is most often used with railway=rail and railway=narrow_gauge.

Inside a railway station area, use usage=main only for the main tracks (not for siding, yard tracks etc.). That also applies for crossover or overtaking tracks outside of the railway stations, which are mapped with service=*


Other values of usage=*:

Tag Comment
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=military Tracks for military use, mainly on military areas, munitions storage areas or connections to the public railroad 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)
usage=science Tracks at spaceports, deep space radiotelescopes, etc.

See also