In a modest yet promising debut, the line between Réding (Moselle) and Saverne (Bas-Rhin) is the first in France to adopt this revolutionary technology. On 23 November 2025, ARGOS—a vital component of the new rail signalling system—was launched along this 20-km stretch of track in eastern central France.

Across France, we’re replacing traditional electromechanical, electric and mechanical interlocking systems —key elements of the nationwide rail network—with ARGOS digital interlocking systems. Existing systems controlled switches, crossings and signalling on track sections, and relied on technology that is now obsolete. Their replacement Is essential. In the decades ahead, the transition to ARGOS will enable centralized management of all interlocking systems nationwide.

ARGOS delivers a more robust and resilient system, ensuring real-time communication between switches, crossings and signalling posts, all managed from a centralized platform. It also drives major cost efficiencies through:

• Industrial processes developed with partners that reduce deployment time by 30% (two years instead of three)
• Real-time network monitoring tools
• Simplified architecture, standardized components and more efficient maintenance, which together reduce costs by 15%