Tag:highway=milestone
 highway = milestone
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| Description |
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| A stone or metal marker on the side of a road denoting the reference and distance travelled. |
| Used on these elements |
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| Useful combination |
| See also |
| Wikidata |
| Q13222303 |
| Status: in use |
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| Tools for this tag |
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This tag page is a stub. You can help OpenStreetMap by expanding it. Similar pages for structural reference: Tag:railway=tram, Tag:waterway=dock. |
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A 
milestone is one of a series of numbered markers placed along a road or boundary at intervals, usually of one unit (i.e. mile or kilometer) or, occasionally, subparts of a unit. They are typically located at the side of the road or in a median. They are alternatively known as mile markers, mileposts or mile posts (sometimes abbreviated MPs). Mileage is the distance along the road from a fixed commencement point.
Note that although the name "milestone" may be inaccurate by modern standards if due to units shown (i.e. - kilometers, not miles) or construction material (i.e. - metal, not stone), "milestone" is still more commonly used than more technically correct terms such as highway location marker.
Similar tags
For "modern" milestones look at
- highway=milestone - Proposed features/Milestones
- railway=milestone
- waterway=milestone
- railway:position=* - see OpenRailwayMap/Tagging
For "historic" milestones look at
Tags
The following features are based on those described in the article Proposed features/Milestones. This tag has not been approved but is widely used. highway=milestone is mandatory. The node should be part of the way that represents the highway.
ref=* is optional, only to be used if the milestone actually has a reference number written on it.
distance=* is optional, only to be used if the milestone actually has a number being the distance from the beginning of the road/rail.
- pk=* has also been used for this purpose, but a discussion on the tagging list in May 2013 suggests distance=* is a better choice than either pk=* or kp=*.
- If no unit is explicitly given, the unit is assumed to be kilometers. To specify a different unit, add a space after the number, then the unit abbreviation (e.g., 35.0 mi).
- Decimal numbers specified with points are allowed.
