TMC TMC is the abbreviation of real-time TrafficMessageChannel, and it is a functional system assisting GPS navigation in Europe. There are three kinds of such systems in the world: TravTek system in America, VICS system in Japan and RDS-TMC system in Europe. TMC is the application of frequency modulation radio frequency modulation system (RDS) in broadcasting real-time traffic and weather information. The data information is silently received and decoded by the vehicle-mounted wireless receiving terminal or navigation equipment equipped with TMC, and conveyed to the driver in various ways. TMC is a mature vehicle intelligent traffic navigation technology in Europe, which can reflect the traffic situation in the region in real time, guide the best and fastest driving route, and improve the efficiency of roads and vehicles. So in function, TMC and other systems are the extension of GPS system application. In the future, domestic GPS systems will definitely add auxiliary systems with such functions to obtain better service results. You can choose the foreign third middle school system, or you can independently develop a new system. In a word, real-time intelligent traffic navigation will surely become a new development field of GPS system.