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Public-images-osm logo.svg evacuation_route
Osm element key.svg
A highway marked as an evacuation route, such as from a flood or hurricane 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 areasmay be used on relations
Useful combination
See also
Status: unspecified

A tag for noting highway=* that are evacuation routes, such as for flooding or hurricanes.

Generally it should be tagged evacuation_route=yes, or evacuation_route=no or you could cite the type of evacuation route: flood, hurricane, etc.

I has been used about 5,000 times according to Taginfo.