DACFIT project at OpenRail Day in Paris
On December 17, 2025, the OpenRail Association brought together the international open-source and railway community for the first edition of OpenRail Day @Paris. This one-of-a-kind event was designed to discuss and to explore the open-source railway innovation as well as to exchange with the people who are actively helping to shape the future of digital railways.
Over 500 professionals from railways, IT and especially IT for railways across Europe and beyond took part in:
- live demonstrations of open-source software for railways projects,
- technical as well as strategic discussions,
- collaborative workshops,
- and many meetings for knowledge exchange between railway, digital and open-source stakeholders from different countries.
This event was the ideal opportunity to present the decision support system helping the rollout of the Digital Automatic Coupling, the DAC Migration DSS, as well as the recent achievements of the DACFIT project in this scope. Please, find below a full summary of the course of the event.
In the morning, the participants could discover the topic of DAC Migration DSS in the Expo & Demo Zone. The DAC Migration DSS aims to provide a comprehensive, cross-project decision support for all aspects of planning the migration to the Digital Automatic Coupler. The currently most advanced part of the DAC Migration DSS is PopUpSim, developed by DB Systel.
At the end of this part of the event, a short presentation, and a live demo of the DAC Migration DSS and the PopUpSim took place, showing how DAC migration can already be simulated in practice.
Later that day the DACFIT workshop on the Retrofit Capacity Plan took place. The focus was on exploring the opportunities and limitations of Open Data, Open Science and Open Source for the DACFIT Retrofit Capacity Plan, an activity that is closely linked with the DAC Migration DSS.
The day was rounded off with presentations of the projects and roundtable discussions in the plenary. For the DAC Migration DSS it was highlighted why DAC migration is one of the most essential strategic tasks in European rail freight, how it can be planned responsibly, and why decisions at this scale need reliable data. The introduction of PopUpSim showed, how simulation can support choosing the right migration methodology and sizing infrastructure capacities correctly.
Altogether over 500 attendees got in touch with the activities around the DAC, the DAC Migration DSS and the DACFIT during the day. Many thanks to Frederik Schäfer, Senior Referent DAC Migration from the DB Cargo who represented the topics at OpenRail Day Paris.