Study of the high-speed trains positioning system: European signaling system ERTMS / ETCS

The signaling system ERTMS/ECTS (European Rail Traffic Management System/ European Train Control System) have been created in order to standardize the European railway signal. ERTMS/ETCS permits safe control of the European railway. Hence, the train detection systems must provide the signaling system with adequate information regarding the position and movement of trains. This paper describes a colored Petri nets model of the train movement and localization on a railway track equipped with the second level of the signaling system ERTM. This operation is difficult to model, because it depends on the onboard and trackside ERTMS sub-systems, which communicate with each other. Especially, Eurobalises implemented on the track and acting as position markers, and the odometer who estimates the train position.