Modeling and evaluation of the availability of an ERTMS level 2 railway signalling system.

Summary In this paper, we first propose the modeling of an ERTMS level 2 railway signaling system using Statecharts. Then, we propose the performance evaluation of this system in terms of availability and average time spent in each state (nominal operation mode, degraded mode and failure mode). The originality of this work lies in the attempt to model the whole ERTMS level 2 signalling system by considering it as a System of Systems. Moreover, human factors and network failures are also taken into account in the proposed model.