The Radio Data System (RDS), was developed for Frequency Modulation (FM) by the European Broadcasting Union (EBU) and its member countries. It is a form of a data coding channel designed to operate in conjunction with commercial FM radio broadcasts. One of the most important features of the RDS is the Traffic Message Channel (TMC) which has the capability of superimposing inaudible data on existing FM station carriers. This data can then be selected for display or speech synthesis by in-vehicle decoders.
An intelligent transportation system (ITS) aims to provide innovative services relating to different modes of transport and traffic management and enable various users to be better informed and make safer, more coordinated, and better use of transport networks.
Emission and congestion problems are increasingly causing persistent economic losses and other social harms in numerous populated areas worldwide. ITS are complex innovative solutions, which successfully address such problems and create a transport environment which is safer, cost optimized and more sustainable.