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RailOS

One Platform, all ATP Systems

RailOS is the software-defined operating system for safety-critical train protection. It runs ETCS and national Class B systems on a single set of hardware — upgradable by software, not hardware replacement.

Disrupting the cost and risk paradigm

Lowest risk technology

Say goodbye to proprietary technology

A RailOS investment insulates you from proprietary technology risk and the regular obsolescence-driven system upgrades that it triggers. Using standard off-the-shelf Ethernet connected devices, RailOS is aligned with the most mature open-standard device interface and high-volume (lowest cost) electronics market.

No more device obsolescence risk

Swap the device, not the system

When a RailOS device becomes obsolete it will never trigger a system replacement. Based on an off-the-shelf Ethernet connected and modular device architecture, RailOS assures cost-effective plug-and-play device replacement over the operational lifetime of your fleet.

Zero supply chain risk for iEVC

The heart of your safety system is assured

Portable to any safe or non-safe computer platform, RailOS and your RailOS Applications remain evergreen, ensuring both supply chain continuity and competition over the lifetime of your fleet for this most vital device.

100% software-defined, open standard ATP platform

Train cab desk fitted with two blue ETCS driver display screens.

RailOS Applications

All ATP and data applications available on the platform.

iEVC Computerbox showing its input and Ethernet connectors on a bench.

Certified Devices

The hardware ecosystem — from the iEVC computer to radios, sensors, and recording units.

Technician entering installation data on a tablet beside a wiring loom.

Open RailOS

The developer program and Application Developer Kit for OEMs and third parties.

Run multiple ATP applications on a single safe computer (the iEVC)

RailOS is a portable, SIL4 certified real-time operating system. Running on our off-the-shelf SIL 4 computer, the iEVC, RailOS supports native RailOS Apps for the ETCS, TBL1+, PZB, and KVB safety standards. In addition, 3rd party ATP systems can be integrated seamlessly with our unique wSTM App.

See our products →

Upgrade by software. Eliminate obsolescence.

When standards evolve or regulations change, RailOS applications are updated remotely. The hardware stays. Your fleet stays compliant without depot downtime or capital replacement cycles.

See our services →

Build your own safety-critical applications

RailOS includes an Application Developer Kit for OEMs and third-party developers. Write, test, and certify new applications on a proven, SIL4-compliant platform. No other ATP vendor offers this.

Explore Open RailOS →

Half the boxes, half the installation time

The software-defined approach consolidates what was previously 4-6 separate hardware units into a single compact system. Lighter on the vehicle, faster in the depot, and simpler to maintain.

See certified devices →

Two rows of yellow shunting locomotives in the maintenance hall.

Bruno Vanlede
Head of Rail Fleet Management at Lineas

“While RailOS liberates us from the burden of the old ETCS cost paradigm, our number one priority is safety. TSC share our safety-first mind-set and have been uncompromising in this regard.”

Applications built on RailOS

Every application is certified, field-proven, and runs on the same SIL4 hardware.

View full application details

ETCS

Certified 2025, in service

Certified award-winning onboard ETCS, combinable with iSTM and wSTM for multi-country Class B interoperability.

TBL1+

In service since 2025

Onboard Class-B ATP for the Belgian network, available with ++, and NG variations.

iSTM

Available

Software-defined STM for ETCS and Class-B integration and interoperability.

TOBA

Available

Telecom onboard architecture — GSM-R, 4G/5G, FRMCS gateway for secure train-to-ground communications.

wSTM

Available

Software-defined national ATP system — replaces legacy STM hardware with a pure-software implementation running on the RailOS iEVC, eliminating dedicated STM boxes.

Timeline

2019

On track testing

2023

RailOS Certified

2024

TBL1+ Certified

2025

ETCS Certified / HLD77 Authorized

2026

40+ Operating HLD77s (and rising) / 2-week Installation and Commissioning

Today RailOS powers the ETCS and Class B retrofit of 109 Lineas freight locomotives operating in Belgium, the Netherlands, and Germany. Next up, Skoda Transport's 27Ev Hybrid Multiple Unit passenger train for Regiojet.

FAQ

How does RailOS help manage ETCS Baseline updates?

RailOS separates the safety-critical ETCS application layer from the hardware device layer. When a Baseline is updated we simply update our software, the underlying hardware remains untouched. RailOS was designed for low-cost and software-only adaptation to the ever evolving ETCS standard.

Can RailOS run third-party applications alongside TSC's own apps?

Yes. The Application Developer Kit allows qualified third-party developers to build, test, and certify their own RailOS applications. Learn about Open RailOS

What hardware does RailOS run on?

For ETCS and National Class B ATP Applications, RailOS runs on our iEVC, an off-the-shelf SIL4 computer for safety-critical applications. But it can ported to any computer and used for any Digital Rail application, be it on-board or trackside, safety-critical or non-safety critical. That is why we have a Open RailOS Development Program, RailOS can run any Digital Rail application.

How does RailOS handle interoperability between ETCS and national Class B systems?

RailOS has allowed us to develop software-only STM (Specific Transmission Module) Apps. For reference, an STM is a technology, usually requiring proprietary hardware, that integrates ETCS and National Class B signalling (safety) logic so that trains can run without stopping between sections of track that are equipped with ETCS and sections that use the Class B technology. With a RailOS STM App, there is no need for separate STM hardware, simpifying ETCS-Class B integration and reducing installation, operation and maintenance costs.

See RailOS in action

Request a technical briefing or discuss how RailOS fits your fleet.

Request a briefing

Get in touch

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