Trackside Asset Specifications: Baseline Set 4 Release 4

The Europe’s Rail Joint Undertaking (EU-Rail), in close collaboration with EULYNX, has published an update of the EULYNX Baseline Set 4 designated as Release 4. EULYNX Baseline Set 4 documentation aims to standardise interfaces and elements of the rail signalling systems across Europe.

This release is a documentation update within the EULYNX Baseline Set 4, continuing the development based on previous releases. The primary focus was to incorporate remaining feedback from the industry and achieve a stable maturity level on those limited topics were this was not yet fully reached in the previous releases. The release is fully integrated into the EU-Rail System Pillar. The release has been prepared under the organisation and authority of EU-Rail System Pillar, bringing a part of the EULYNX development under technical authority of the System Pillar.

All specifications related to trackside assets and transversal functions are applicable for both the current EULYNX architecture and the future rail target architecture, agreed in the framework of the EU-Rail System Pillar, therefore published as a single set of specifications under a common publication by EULYNX and EU-Rail, delivering in total 25 specification documents.

In addition to the common documentation release, EULYNX published also additional specifications and supporting documents for the current EULYNX architecture, which are integrated in the EULYNX part of the Baseline Set 4 Release 4, delivering additional 24 documents.

This publication by EU-Rail System Pillar and EULYNX provides the stable basis for ongoing investments and industry developments related to the EULYNX architecture, ensuring both migration and compliance with the future System Pillar target architecture.

The efficient development process and successful sector-wide approval under the umbrella of the System Pillar demonstrate the role of the System Pillar as the generic system integrator and the architect of the future European Union’s railway system, successfully collaborating with sector initiatives, such as EULYNX, to bring all rail sector representatives under a single coordination body.

This release is an update of the Release 3 of Baseline Set 4, which was released in June 2024 and of Release 2 of Baseline Set 4, which was released in June 2023.

Cover Document

• Cover Document – EU-Rail / EULYNX Baseline Set 4 Release 4

Deliverables

Phase 4

Requirement Specifications

• Requirement Specifications

System architecture

• Specification of Point of Service Signalling

Phase 5 – Interface Specifications

SCI

• Interface specification SCI

SDI

• Interface definition SDI

SMI

• Interface definition and specification SMI

Requirements database

• Windchill Requirements Connector Exchange Summary V.1.0 – Exchange Summary
  • Database

Models

• BL4 R4 Model Export

Simulators

• BL4 R4 Simulators

OPC UA model files

• BL4 R4 SDI models
• BL4 R4 SMI model

Conformance test cases 

• BL4 R4 Conformance test cases

The documents have been prepared for EU-Rail, however, they reflect the views only of the authors, and EU-Rail is not liable for any consequence stemming from the reuse of these publications.