HI Gerd, you are right, the patch should have warned in this scenario. There was an error in an if statement which I have now corrected. Looking at this particular example has also led me to add a test for highways overlapping roundabouts. Please see the updated patch. I note that way 456114715 appears to have been fixed in OSM today. Regards, Mike -----Original Message----- From: Gerd Petermann [mailto:GPetermann_muenchen@hotmail.com] Sent: 09 January 2017 07:54 To: mkgmap-dev@lists.mkgmap.org.uk Subject: [mkgmap-dev] roundabouts3.patch Hi Mike, please review https://www.openstreetmap.org/way/456114715 in the attached pbf file. The trunk version complains about this and I think that's good, the patched version doesn't. Gerd