|A dyke or raised bank to carry a road, railway, or canal across a low-lying or wet area.|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
In transportation an embankment is a raised bank to carry a road, railway, or canal across a low-lying or wet area. If this low-lying area is permanently or tidally flooded, then the raised bank is called a causeway.
For embankments not associated with transportation, see man_made=embankment. For an artificial bank (with no highway constructed on top) to redirect or prevent flooding by a river, lake or sea, see also man_made=dyke
Draw a way and add the appropriate highway=*, railway=* or waterway=* tag. Add the embankment tag with either one of the documented values from the table below or another value as can be found on taginfo
|embankment||yes||A generic value for embankments|
|embankment||dyke||An embankment for flood protection (called a dyke or levee) which also carries a road or railway. Also see man_made=dyke when there is no highway or railway constructed on top|
Unlike bridges, a layer tag is rarely needed for embankments and should not be used without a good reason.
Single line embankments
Embankments that share a way with a highway, railway or waterway should be rendered with "spikes" on both sides.
This is supported in Osmarender (which is no longer maintained) and alt-Carto style from Tracestrack.
These embankments should be rendered with the left-hand side of the way being the high side and the right-hand side being the low side. (Supported by OSM Carto, but only for non-closed ways that are tagged with man_made=embankment, not for those tagged with embankment=yes.)
- To represent a raised finger of land (as in the illustration): draw two ways bordering the raised land, each tagged man_made=embankment and going in opposite directions.
- To present a banked enclosure (such as an iron-age hill fort): draw two ways with the outer way travelling anticlockwise and the inner way clockwise. Additional ways can be used to present ditches, scarps, aprons and terraces in large sites. Note that if a closed way is drawn without two breaks (creating two separate but connected ways) then it will be interpreted as an area and not displayed in the Standard layer.