Abstract—In France, the railway lines are divided into the national and international lines. While the former has a proper implementation of the railway signalling systems as relay-based or computer-based systems, the latter follows the guidelines defined by the ERTMS standards, focusing on the interoperability throughout Europe. In a previous work we presented how the national legacy relay-based Railway Interlocking Systems (RIS) can evolve to use a computer-based technology in order to benefit from its advantages. In this present article, we present how these computer-based systems can be used in order to allow the evolution from a national line towards an ERTMS compliant international line. This proposition is based on the fact that the previous work provides the support for evolving the track-side technologies with, for instance, the use of GNSS for the train geo-localisation instead of electrical circuits-based train detection systems. Then, a discussion of the impact of this evolution over the system safety is presented. 

Index Terms—railway interlocking systems, computer-based systems, French national railway lines, ERTMS

Cite: Dalay Israel de Almeida Pereira, Ouail Himrane, Philippe Bon, and Julie Beugin, "From French National Signaling Systems to ERTMS: Considering the Evolution of Track-Side Systems," International Journal of Signal Processing Systems, Vol. 9, No. 2, pp. 11-16, June 2021. doi: 10.18178/ijsps.9.2.11-16