How to map
Follow the general instructions in the OSM wiki. Add name=* if known (See Korea Motorway Names for a list). For tunnels and bridges the name=* will be different for the bridge or tunnel section, but please ensure that ref=* stays the same.
In the example image the tags are:
highway=motorway oneway=yes (Motorways are drawn as two ways, one in each direction) ref=10 name=남해고속도로 name:en=Namhae Expressway name:ko=남해고속도로 name:ko_rm=Namhaegosokdoro
Interchanges and Junctions
There are two kinds of interchange. The first is where there is an entrance to or exit from the motorway. These are signed with the name of the interchange followed by 'IC' or a motorway exit symbol: .
The second kind is where two motorways meet or cross and it is possible to change from one to the other. These are signed with the name of the junction followed by 'JC' or 분기점.
How to map
The link roads leading to or from the motorway should be tagged highway=motorway_link and oneway=yes. There are no tags needed for the node where the link road joins the motorway itself. Link roads have no name=* or ref=* tags.
barrier=toll_booth name=진주 name:en=Jinju name:ko=진주
The link roads between the motorways should be tagged highway=motorway_link and oneway=yes. There are no tags needed for the node where the link road joins the second motorway. Link roads have no name=* or ref=* tags.