So I work for a radio company here in the US and we have implemented the RDS system. This is data that is transmitted embedded into the FM radio signal. It has an electronic flag that says "I am broadcasting a traffic report" - some RDS capable radios have a traffic button that you push and it will take you to a station broadcasting traffic reports.

We have also enabled TMC - a European standard for broadcasting real-time traffic incidents using RDS. There are TMC-capable navigation systems out there from Audiovox, Garmin, etc that show you the traffic incidents as icons on the map.

Part of the standard is speed, flow and re-routing information and that is what we are working to get in there now. There are many different layers to making it work. There are companies that own the maps that have to be licensed; other companies own the location-code "grid" that overlays the traffic information onto the map; other companies own topography information.

Brian