Re: [mkgmap-dev] routing problem on motorway ramp

stefan@binaervarianz.de wrote:

I've looked through the osm data (in JOSM) but found no irregularities. All nodes are connected, there's no oneway in the wrong direction or anything. The ramps are tagged with ref=A4;B4 which seems odd, but I don't know the proper handling of ramps regarding ref numbers.

Motorway and motorway_link are implicitely oneway. This is correct according to the OSM wiki and the style rules of mkgmap reflect this. In your example there is a part of the ramp which is common for both directions. This part must be set "oneway=no". I made that change a minute ago. Please try again.