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Dear reader,
Depots are often seen as the invisible backside of rail operations — the places where trains rest, are maintained, and are prepared for their next deployment. Operationally, however, they are anything but secondary. Shunting movements, maintenance scheduling, stabling management, and the coordination between workshop and operations all play a decisive role in how efficiently a fleet is used — and how resilient a network remains in the event of disruption.
Advancing digitalisation is fundamentally changing this space. Automated shunting processes, digital twins of depot facilities, and AI-supported dispatching reduce turnaround times, improve utilisation, and bring transparency to processes that were long managed primarily through operational experience. The economic leverage is considerable: every hour a vehicle sits idle in the depot is capacity the operation doesn't have.
One aspect gaining particular relevance in this development is formal methods — mathematically grounded approaches to specifying and verifying safety-critical control logic. Traditionally applied mainly in signalling technology, by companies such as Prover, which uses formal methods and digital twins to develop and verify signalling systems, the same principles — precisely formalising requirements, mathematically proving system behaviour rather than only testing it — are becoming increasingly relevant wherever automation extends into safety-relevant areas, including automated shunting and control processes in depot operations. This shift ties into a broader movement toward open signaling: replacing closed, vendor-locked systems with open, modular architectures that allow components from different suppliers to work together. We see this as a genuinely forward-looking development for the industry — one with the potential to reduce lifecycle costs, ease long-term maintenance, and create the conditions for faster innovation across signalling and, increasingly, depot and control systems alike.
This issue takes a closer look at how digital solutions are improving efficiency in depot operations — drawing on the completed AStriD research project on automated tram depots.
Best regards, Your RMR-Team |
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Depots offer ideal conditions for early-stage autonomous rail operation: no public access, low speeds, and tightly regulated processes. This is the premise behind AStriD, a German mFUND-funded research project that ran from October 2019 to December 2022, demonstrating the technical feasibility and assessing the economic potential of full depot automation.
The project, coordinated by Siemens Mobility, prototyped a fully automated tram depot based on an autonomously operating tram and a digital depot environment, developed together with ViP Verkehrsbetrieb Potsdam. The work covered the required sensor and localisation technologies, data exchange between the systems involved, and the regulatory and approval framework for autonomous tram operation — questions that needed to be addressed from the outset rather than retrofitted once the technology was in place.
By analysing existing processes at the ViP depot, the project team identified concrete use cases with automation potential — for instance automated washing, supply, and stabling runs. These findings were abstracted and documented using standardised description methods to ensure they could be transferred to other depots, not just applied to the specific Potsdam site. Building on this, the prototype implementation delivered an exemplary system architecture for an automated depot, providing a foundation for future deployments, and defined the further development work still required for serial implementation.
Several specific outcomes are worth highlighting. On the technical side, findings on obstacle detection, the approval of AI-based software, and standardisation are now feeding into ongoing follow-up projects, including BerDiba, Safetrain, and ERJU — meaning AStriD's results are continuing to shape current research rather than ending with the project itself. On the economic side, the project confirmed that significant efficiency gains in depot operations are plausible, though their precise scale could not yet be reliably quantified at project completion — a candid acknowledgment that technical feasibility and economic certainty are two different milestones.
On the regulatory side, AStriD produced a roadmap outlining the legal requirements for autonomous tram operation, identifying where legislative action is still needed and drawing explicit parallels to the regulatory path already taken for autonomous driving in road transport.
The consortium brought together Siemens Mobility as coordinator, ViP Verkehrsbetrieb Potsdam as depot operator, the Karlsruhe Institute of Technology (KIT) for digitalisation and process automation expertise, IKEM for legal and economic analysis, and Codewerk for data and systems integration. Total project volume came to €4.3 million, 61% of which was funded by the German Federal Ministry for Transport.
What makes AStriD a useful reference point today is less the specific tram involved and more the methodology: a structured way of identifying which depot processes are realistically automatable, documenting that knowledge so it transfers beyond a single site, and treating regulatory groundwork as part of the technical roadmap rather than an afterthought. |
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Research Results Published | |
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| D4.1 List of use cases and optimisation criteria |
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QUIETERRAIL is an Europe's Rail exploratory research project addressing noise and vibration in railway infrastructure through a whole-system approach. Its recently published deliverable D4.1 presents the outcomes of a consultation process with infrastructure managers and railway stakeholders, mapping representative track configurations, relevant cost data, technical constraints, and available mitigation measures.
Central to the deliverable is the establishment of a set of optimisation criteria — covering noise and vibration performance, life-cycle costs, RAMS parameters, and health, environmental and societal impacts — designed to underpin a web-based decision-support tool for infrastructure planning and maintenance. |
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D2.1 Architecture and working plan of the continuous ERJU scientific observatory D2.2. Position paper on detected research gaps and proposals to cover them |
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ACADEMICS4RAIL aims to establish a stable scientific community facilitating structured knowledge exchange between academia, Europe's Rail, and ERRAC. Two deliverables published in June 2026 lay the groundwork for this. D2.1 establishes a scientific observatory built on a systematic review of Shift2Rail outputs, migration documents, and research assessments. D2.2 identifies concrete research gaps — particularly in long-term foundational research, interdisciplinary collaboration, and the translation of outputs into higher technology readiness levels — and proposes strategic actions to improve coherence between academic research and railway sector priorities. |
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Planned Research Projects | |
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Extreme weather events — heavy rainfall, flooding, heatwaves — are becoming more intense due to climate change and increasingly disrupt both rail and road infrastructure. Yet a systematic, comparable way to capture and assess these climate-induced damages has so far been missing.
A new project by DZSF (Deutsches Zentrum für Schienenverkehrsforschung) sets out to close this gap. It will develop indicators and damage functions covering both physical infrastructure damage and the operational impacts of climate-related events, applying them in case studies across rail and road. The methodology will be documented in a practical user guide, enabling climate-related damage potentials to be assessed systematically and quantitatively.
The results are intended to support the goals of Germany's national climate adaptation strategy (DAS 2024) and, following evaluation by the respective transport sectors, to be gradually prepared for practical application — for example in the planning, prioritisation, and approval of adaptation measures, or in monitoring and reporting systems. They are also expected to form a basis for further research and analysis by industry practitioners.
Project duration: 30 months. Planned start: Q4 2026.
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