Perhaps Sonic|blue team in Germany could help with this? AFAIK, trafic info is especially good there. (Here in Croatia some stations with national coverage broadcast it and others emit RDS TI allert - virtually all stations use RDS to some extent - but quality of info is poor.)

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green