Map of City Navigator-HERE is connected with TMC location table form your traffic provider because TMC message is not coordinates exactly but it is only a data like that: that a crash took place between Exit 3 (location table point XXX) and Exit 4(location table point XXY), northbound on a particular motorway. Probably it are Here or the other free service provider and you can see it in traffic provider list. This map have TMC location table in TRF subfile in full img.
Free map do not contain such information in it and so traffic service do not work with it. I do not think that it is not possible to add a TMC location table by small force.