Some of the turn restriction warnings reported by mkgmap are correctly mapped in OSM. They all seem to be near tile borders. Shouldn't keep-complete option of splitter take care of these relations? If you want to check some of these relations, here is the list I currently get processing a customized spain.osm.pbf file (I can supply the file if necessary) (max-nodes=2100000): Turn restriction http://www.openstreetmap.org/browse/relation/1610018 Turn restriction http://www.openstreetmap.org/browse/relation/2556829 Turn restriction http://www.openstreetmap.org/browse/relation/2556828 Turn restriction http://www.openstreetmap.org/browse/relation/1619758 Turn restriction http://www.openstreetmap.org/browse/relation/1619754 Turn restriction http://www.openstreetmap.org/browse/relation/1619760 Turn restriction http://www.openstreetmap.org/browse/relation/1874949 Turn restriction http://www.openstreetmap.org/browse/relation/1471323 Turn restriction http://www.openstreetmap.org/browse/relation/2733411 Turn restriction http://www.openstreetmap.org/browse/relation/1553991 Turn restriction http://www.openstreetmap.org/browse/relation/1553985 Turn restriction http://www.openstreetmap.org/browse/relation/1554001 Turn restriction http://www.openstreetmap.org/browse/relation/3499015 Turn restriction http://www.openstreetmap.org/browse/relation/1874952 Turn restriction http://www.openstreetmap.org/browse/relation/1874950 Turn restriction http://www.openstreetmap.org/browse/relation/3121764 Turn restriction http://www.openstreetmap.org/browse/relation/2512039 Turn restriction http://www.openstreetmap.org/browse/relation/3328204 Turn restriction http://www.openstreetmap.org/browse/relation/3395687 Turn restriction http://www.openstreetmap.org/browse/relation/3395691 Turn restriction http://www.openstreetmap.org/browse/relation/3395685 Turn restriction http://www.openstreetmap.org/browse/relation/3009483 Turn restriction http://www.openstreetmap.org/browse/relation/3009481 Turn restriction http://www.openstreetmap.org/browse/relation/3497275 Turn restriction http://www.openstreetmap.org/browse/relation/2074869 Turn restriction http://www.openstreetmap.org/browse/relation/3103660 Turn restriction http://www.openstreetmap.org/browse/relation/1694535 Turn restriction http://www.openstreetmap.org/browse/relation/1694528 Turn restriction http://www.openstreetmap.org/browse/relation/1694526 Turn restriction http://www.openstreetmap.org/browse/relation/1694533 Turn restriction http://www.openstreetmap.org/browse/relation/3526934