I don't have the Empeg tuner but RDS data is built into my factory radio. I'm in OC but drive in LA frequently.

It's semi-worthless.

Some stations broadcast their call signs, and a very few (mostly college stations) also broadcast the name of the show that's playing and when it's normally on.

I've never seen a traffic notice sent out that way, and the few stations that send the "Traffic Annoucement" signal at all do so constantly, so you just jump to their channel if you try to go to a traffic annoucement, regardless of what mindless pap they're droning on about.

I've decided to forsake radio completely in favor of the Empeg. If I could only get Speed-sensitive volume I could remove the factory radio completely and it would make my life much simpler.