| +/- highway=motorway_junction
An exit from a motorway or other major road.
Use the highway=motorway_junction tag to identify a point along a highway=* with junction refs or names where it is possible to exit the highway onto another road. This is usually found along a highway=motorway, but is also applicable to other roads with numbered or named junctions including some highway=trunk and highway=primary roads. Some countries name their motorway junctions (e.g., Germany, France, Italy), while others number them (e.g., UK, US, Spain).
How to use
Add a highway=motorway_junction tag at each node along a highway with named or numbered junctions where a driver can legally exit, onto a highway=motorway_link, highway=trunk_link or other road class. This node should be positioned as the last point before the splay at which it is still possible to make a smooth turn. The following tags may also be used at the same point:
- ref=* to identify the exit number, as indicated on nearby signage.
- exit_to=* to indicate which destinations shown on the nearby signage that can be accessed by taking to exit. See the section below to differentiate between this key and the key destination=*.
- name=* to add a name for the junction itself (for example Catthorpe Interchange)
Note for Germany: Links between two motorways (i.e., Autobahnkreuz or Autobahndreieck) should only be tagged with the ref=* of the motorway the exit leads to if there are signs that state this ref, such as A6.
Relation:destination_sign can be used in non-interchange situations.
Destination of the exit
Main article: Key:destination
The destination of an exit can be indicated either on the motorway_junction note with exit_to=* or on the way that branches off from the node by destination=*, together with its subkeys. The key exit_to=* has the disadvantage that it might be ambiguous in some cases, e.g. on parallel motorways (though using exit_to:right and exit_to:left solves this, which is also a problem for ref=* on the node), that it doesn't work for non-motorway junctions with more than two destinations, and that it does not allow to break down destinations per lane.
The key destination=* is used on the way directly after the junction, not the junction itself. The key destination:lanes=* can provide further details like the exact position of the signpost and the destination of each lane. See the article about the key destination=* and its subkeys for further details and examples.
- name=* for the name of the junction
- ref=* for the signposted reference of the junction
- destination=* to provide information about the destination of an exit