The safety of off-road vehicles is nowadays always more important and many international standards were published to reduce the risk of accidents and to investigate their causes. For this reasons in this Master thesis both these two different aspects have been taken in consideration. In particular it has been developed a stand-alone GUI (Graphic User Interface) able to read the file recorded by a data-logger installed on a telescopic handler. This GUI returns a 3D animated representation of the telescopic handler showing the operations that the machine has done during the recorded period of time. This application is useful in case of overturning of the machine in order to investigate the causes that have led to the accident.