Traffic Message Channel

The TMC (traffic message channel) traffic data is received via the frequency modulation (FM) radio antenna and broadcast in many European countries.

TMC is a function of the FM, radio data system (RDS), which broadcasts real-time traffic and weather information. Data messages are received and decoded by the TSD and passed onto the navigation system to inform the driver of impending traffic congestion and if possible provide an alternative route.

TMC conforms to a global standard that has been adopted by:

• Traffic data gatherers
• Information service providers
• Broadcasters
• Vehicle/receiver manufacturers

All TMC receivers use the same list of event codes, while the location database (on the hard-drive) contains both a country-specific set of location codes for the strategic European road network.