The open signaling initiative

The future-proof way to modernize rail and metro signaling

Join a movement reshaping how rail signaling systems are built and maintained. With openness at its core, the open signaling initiative unlocks innovation, flexibility, and long-term sustainability.

Open signaling
Open signaling is not just a technical innovation – it’s a sustainable, scalable, and future-ready framework for managing critical railway infrastructure.Open signaling is not just a technical innovation – it’s a sustainable, scalable, and future-ready framework for managing critical railway infrastructure.

The open signaling initiative is redefining how rail and metro signaling systems are developed, deployed, and maintained.

Signaling systems are today delivered as closed systems that make customers dependent on the supplier for decades. When support and maintenance agreements expire, it is not uncommon that the whole system needs to be replaced, at high costs and with long service interuptions. Open signaling changes this paradigm entirely.

Inspired by the modularity and flexibility of earlier relay-based systems, and by open systems in domains such as IT/ICT, open signaling reintroduces freedom and adaptability into modern rail and metro signaling. It promotes open, modular, and interoperable architectures where independent components from different suppliers can seamlessly work together.

Key principles:

Open interfaces based on standards like OPC UA, MQTT, and EULYNX/RaSTA for broad compatibility

Loosely coupled components, separating hardware platform and signaling logic for independence and step-by-step upgrades

Commercial-off-the-shelf (COTS) hardware platforms for cost efficiency and supplier independence

This approach empowers infrastructure owners by giving them full control and insight into their systems. It supports gradual system evolution without traffic disruption, and simplifies safety assessments by isolating changes to specific modules.

Ecosystem of partners

A dynamic ecosystem supports this model – bringing together hardware vendors, software developers, and system integrators. Each stakeholder can be independently selected, enabling true competition and flexibility across the entire system lifecycle.

Open signaling is not just a technical innovation
– it’s a sustainable, scalable, and future-ready framework for managing critical railway infrastructure.

Join the open signaling ecosystem.

Interested in becoming part of a more open, flexible future for rail signaling?
Contact jesper.carlstrom@prover.com to learn more.

Prover is passionate about enabling open signaling. With formal specification tools, certified software development processes (CENELEC EN 50716/50128 SIL 4), and deep domain expertise across both rail and metro sectors, Prover helps building signaling systems that evolve sustainably.

From legacy system migration to automatic code generation and continuous support, Prover ensures that open signaling systems do not become obsolete.