Alstom has announced the successful commissioning of its latest digital interlocking technology, ARGOS, at Montbard in eastern France. Installed near Dijon, this marks the first operational deployment of a third-generation railway signalling system developed in partnership with SNCF Réseau.
The Montbard installation represents a significant milestone in the modernisation of France’s rail infrastructure. Designed to support a more connected and efficient network, ARGOS introduces advanced digital capabilities that streamline signalling operations and improve system performance.
The deployment also aligns with the rollout of the European Rail Traffic Management System, which is being implemented on major corridors such as the Paris–Lyon high-speed line to increase capacity and optimise traffic management. The Montbard site, located along a 30-kilometre stretch between Nuit-sous-Ravières and Les Laumes, has been selected as a pilot zone. This section provides a real-world testing environment to validate the system’s reliability and resilience before broader national adoption. The commissioning concludes nearly five years of joint engineering and fieldwork carried out by teams from both organisations.
ARGOS introduces a new level of integration between trackside equipment and centralised control centres, enabling continuous, real-time communication. This approach enhances operational reliability while improving maintenance efficiency. It also supports faster system upgrades and reduces lifecycle costs, addressing key priorities for the future of rail infrastructure.
At the core of the solution is Alstom’s Onvia Lock technology, which directly connects signalling components such as switches and signals to intelligent control units. By removing the need for traditional relay-based systems, the design reduces physical infrastructure, simplifies installation, and lowers maintenance demands. Its modular architecture allows the network to adapt more easily to future traffic requirements, while built-in cybersecurity measures strengthen system protection from the outset.
The project reflects a large-scale mobilisation across Alstom’s French operations, involving approximately 400 specialists. Key contributions came from engineering teams in Saint-Ouen, digital systems experts in Villeurbanne, and assembly operations in Mignières, where prefabricated signalling units were prepared.
With this achievement, Alstom reinforces its role in advancing digital signalling solutions in France. The Montbard deployment serves as a foundation for future expansions, supporting a safer, more efficient, and technologically advanced railway network for passengers and operators alike.
