From OpenStreetMap Wiki
|Describing the kind of a junction.|
|Used on these elements|
|Documented values: 7|
|Tools for this tag|
This key describes how a specific junction is constituted.
For usage together with highway=* key
- values not discussed with the community and using obscur abbreviations (should be replaced by plain values in the future):
For usage without highway=* key
- junction=yes The presence of road junction as such.
- supervised=yes can be used in combination with the
junctiontag when a police officer ( Verkehrsposten) stands in the middle of the junction to direct traffic. Sometimes there is a small platform on which the officer can stand. Such supervised junctions can no longer be found in industrialized countries (traffic lights are used instead), but they are still common in countries such as Bhutan or North Korea.