Body & Accessories Entertainment Systems
Traffic Message Channel
• The TMC (Traffic Message Channel) function is a specific application of the RDS (Radio
Data System), using a FM receiver that is incorporated in the navigation unit. It receives
traffic messages and forwards the received information to the CPU. The messages can
be displayed and the route can be automatically recalculated when there are traffic jams
along the first selected route.
• TMC is a service which is provided free of charge by some radio stations. The quality of
the traffic information depends on the source of information. Either the radio stations
receive the information from the police and listeners, or in addition from companies
providing more detailed information. Sometimes the verbal information broadcasted by a
radio station is different to the TMC information they transmit.
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1 Traffic messages 3 Radio station
2 Traffic information center
• The TMC icon is shown on the display when the system receives a signal from at least
one radio station that broadcasts TMC information.
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1 TMC icon
Service Training Mazda5 09-83
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