The Traffic Message Channel (TMC) is a technology for providing traffic and travel delay information to drivers. The complementary Radio Data System (RDS) broadcasts digital information carrying TMC updates via FM radio waves.
An RDS-TMC traffic antenna (see photo) may come with compatible car GPS navigators, or may be ordered as an optional accessory. The RDS-TMC antenna is usually designed to be affixed to the lower part of the car windshield via suction cups.
An RDS-TMC traffic antenna may also be integrated with a power port plug, eliminating the need for an additional wire and dashboard/windshield clutter.
RDS is also capable of delivering news, weather, and other data.
TMC traffic information is usually gathered from police reports, traffic cameras, sensors, and anonymous cellular network data.
