Asus R300 User Manual page 103

You need a TMC receiver attached to your PNA to receive TMC information.
If public TMC data is broadcast at your location, ASUS GO will automatically take into
account the TMC information received. You do not need to set anything in the program.
The receiver will automatically search the FM radio stations for TMC data, and the
decoded information will immediately be used in route planning. The moment ASUS GO
receives traffic information that may affect your route, the program will warn you that it
is recalculating the route, and navigation will continue with a new route that is optimal
considering the most up-to-date traffic conditions.
The TMC subsystem can be started from the GPS Data screen by tapping the TMC button.
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