Siemens Mobility Introduces Signaling X for Metro Operations

Railway Technology Signaling X Transfers CBTS System into Cloud-Enabled IT Infrastructure

2025-11-20 From Stefanie Eckardt | Translated by AI 1 min Reading Time

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Siemens Mobility has presented Signaling X for metro operations for the first time at the Singapore Rail Test Center. With Signaling X, the Communications-Based Train Control system – the technological standard for metro and urban rail networks – is transferred into a centralized, cloud-enabled IT infrastructure: a locally operated Signaling Data Center.

At the Singapore Rail Test Center, Signaling X celebrated its world premiere in metro operations.(Image: Siemens Mobility) — At the Singapore Rail Test Center, Signaling X celebrated its world premiere in metro operations.
(Image: Siemens Mobility)

Safety-critical functions run on commercial off-the-shelf (COTS) hardware and are executed and secured by the Distributed-Smart-Safe-System Platform (DS3) from Siemens Mobility. The result: up to 20 percent higher operational efficiency and up to 30 percent energy savings. This allows more trains to operate safely at shorter intervals. Following its presentation at InnoTrans 2024 and its introduction in long-distance traffic, Signaling X is now also ready for use in urban public transit.

Interlockings, Signaling Systems, and Control Technology in a Virtualized Data Center

Signaling X represents a fundamental advancement in control and safety technology for both long-distance and local transport. This cloud-enabled platform integrates interlockings, signaling systems, and control technology into a centralized, virtualized data center. Safety-critical functions such as interlocking logic and non-safety-related systems such as timetable management and traffic optimization run on the same standard IT hardware and communicate via APIs. This enables seamless, efficient, and flexible railway operations. Unlike hardware-dependent systems that rely on older chip technology and fill entire rooms with specially developed interlocking electronics, Signaling X demonstrates that software in global systems can run on COTS standard hardware.

The technological foundation is the DS3 platform introduced in 2020, which runs on commercial hardware and reliably operates safety-critical applications in a scalable, redundant network. This cybersecure environment improves operational efficiency, reduces energy consumption, and shortens train headways. (se)

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Date: 08.12.2025

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