Key:dual_carriageway

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Public-images-osm logo.svg dual_carriageway
Dscf0444 600.jpg
Description
Specifies whether a highway is a dual-carriageway (divided) road Edit or translate this description.
Group: Highways
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasshould not be used on relations
Documented values: 2
Requires
Useful combination
See also
Status: unspecified

See Tag:dual_carriageway=yes for discussion how this tag is used.

Comparison

(can indicate different values; may be confusing for carriage=* and other *way=*.)

(may imply multiple-carriageway)

There was a less sharp uptick for carriageway=* in 2013, than the rise of dual_carriageway=* in 2014.