The use of high speed trains worldwide is becoming increasingly important. High speed freight trains and passenger trains are frequently preferred since they respect the evnvironment and the use of green renewable energies which are the key to an ecosustainable world. In Europe, typically these trains begin their journeys in one country, pass through other countries and terminate in yet another country. Consequently the concept of interoperability is a fundamental goal to reach and requires specific standards between countries to support safety and respect levels of energy consumption. The system which supports this requirement from the ERA (European Railways Agency) is the ERTMS (European Railway Traffic Management Systems) that was introduced in Italy in 2005.