Version mkgmap-r3436 was committed by gerd on Mon, 02 Feb 2015 use not-contained filter to avoid duplicated values in route_ref, use semicolon instead of comma to separate the values. Proposed by A drian: "I have chosen the semicolon because it is the recommended separator in OSM https://wiki.openstreetmap.org/wiki/Semicolon Also, using a comma as separator would not fix my example. Another possibility might be to recognise multiple characters as separators, e.g. the semicolon and the comma would both be treated as a separator. This would depend on whether it is feasible to extend Maxim's patch to recognise multiple separators."