TMC = Traffic Message ChannelEste de fapt un post radio cu RDS ce emite locatiile unde se lucreaza in carosabil, ambuteiaje, cozii in trafic etc.
Pentru a receptiona aceste mesaje, aparatul GPS trebuie sa fie dotat cu un receiver TMC.
Softul de navigatie interpreteaza aceste mesaje RDS si le "deseneaza" pe harta, avand posibilitatea sa fie ocolite automat sau la cerere.
In Romania nu exista asa ceva si nici macar nu este "planuit", iar in Ungaria anul trecut se faceau teste si se poate sa fie online sistemul.
Incepand din Austria, spre vest, poti folosi aceasta optiune fara probleme.
How it works
Each traffic incident is sent as a TMC message. One message consists of an event code and a location code in addition to time details.
The message is coded according to the Alert C standard. It contains a list of max 2048 events (1402 pr 01.02.2007) which can be translated by a TMC receiver into the language of the user.
Location code tables are maintained on a national level and assign numbers to locations on the road network. Those location tables are integrated in the maps provided by NAVTEQ and Tele Atlas.
The source of traffic information is typically police, traffic cameras, loops, floating car data and others.
Sursa :
Wikipedia
Subiect: TMC (Citit de 6241 ori)