|surface = gravel|
|This tag has very large meaning range. Used for cases ranging from huge gravel pieces like track ballast used as surface, through small pieces of gravel to compacted surface.|
|Used on these elements|
|Status: in use|
|Tools for this tag|
|TODO: incorporate usage analysis and reasoning from https://lists.openstreetmap.org/pipermail/talk-au/2021-March/014445.html and https://lists.openstreetmap.org/pipermail/talk-au/2021-March/014450.html|
This tag has very large meaning range. Used for cases ranging from huge gravel pieces like track ballast used as surface, through small pieces of gravel to compacted surface.
For long time this tag was described at Key:surface page as "Broken/crushed rock with sharp edges, known as ballast on railways. Usually loosely arranged. Typical size for road and surface construction range between 4 and 8 cm".
It may also refer to roads of compacted surface that are unpaved but high quality roads, often allowing comfortable travel.
To match the tagging scheme in use for paving stones (surface=paving_stones, proposed in Proposed features/Paving stone details), additional information about the surface can be added with tags like surface:colour=*.
- Category:Gravel roads at Wikimedia commons demonstrating variety