Radio Data System-Traffic Message Channel (RDS-TMC)
The Radio Data System-Traffic Message Channel (RDS-TMC) is a broadcast for delivering traffic and travel information to the driver. The RDS-TMC data is typically coded using the 57 kHz±3 kHz subcarrier on FM broadcast.
The RDS-TMC system uses a decoder in the audio-navigation unit to decode the traffic information data. It is integrated directly into a navigation system.
The traffic information is displayed with the navigation route guidance. It is used to avoid traffic jam and accident (see navigation system owner's manual for more information).