Supporting the development of the Advanced Protection System (APS)


Berlin, February 2023 to ongoing
DSTW Digital Interlocking/CBTC

Travelling at the optimum distance with train-centric safety logic = more trains on the line

Europe's mobility challenges in the coming decades and the urgent need to improve European rail transport prompted the partners of the R2DATO consortium of FP2 to join forces and propose innovative technologies, agile methodologies and deployment strategies to address these challenges through the digitalisation and automation of the European Union's rail system.


The APS is the core component of Advanced Digital Infrastructure (ADI). The introduction of this new safety logic with ETCS enables travelling at the optimum distance (moving block). It moves away from the conventional block-centred spacing and towards a train-centred spacing. The train as a safety object takes centre stage.

Key areas of service

  • RAMS Management

  • Risk analysis

  • RAM Analysis

  • Safety case creation

  • System definition ADI and APS

  • Test case creation Moving Block Demonstrator

  • EN50126

Special features

In APS, NEXTRAIL supports the creation of the system definition, RAMS management and accompanies and advises the development process in accordance with EN50126. In addition, test cases for the moving block demonstrator are being created in parallel at European level in the R2DATO project in the Innovation Pillar.

Contact person

Here you will find your contact person for Safety Management
Expertin Dr.-Ing. Sonja-Lara Bepperling

Dr.-Ing. Sonja-Lara Bepperling

Member of the Executive Board, Head of Railway Safety, Registered inspector for equivalent safety and risk assessment
Frankfurt am Main
Dr Sonja-Lara Bepperling is a member of the Executive Board and Head of Railway Safety at NEXTRAIL GmbH. For 15 years, she has been a proven expert in operational and technical risk analyses in the railway sector – in control-command and signalling system in particular. She possesses methodical expertise in risk and hazard analyses as well as in-depth knowledge of the processes involved in the approval processes.