rail-signpost git:20261014.6ac4320A

Immutable. This exact content never changes and is served at /api/v1/blob/4719ea01f932c69a.

---
name: rail-signpost
kind: signpost
description: "Signpost (not a knowledge pack) for the railway RAMS and signalling assurance standards: EN 50126-1:2017 and EN 50126-2:2017 (both with A1:2024) for the RAMS process, EN 50128:2011 (A1:2020, A2:2020) for software for railway control and protection systems, and EN 50129:2018 and EN 50129:2026 for safety-related electronic systems for signalling, plus the free CSM regulations and ORR guidance that cover the risk-process need. Contains no source content: each row carries only the designation, title, edition, owner, redistributability status, and an official URL. Use when you need to identify, cite, or locate one of these documents. No in-repo pack covers these standards."
---

<!-- argument-hint: [standard designation or topic, e.g. EN 50126 / EN 50128 / EN 50129 / EN 50159 / CSM 402/2013 / RSSB] -->

# Railway RAMS and Signalling Assurance Standards: Signpost (pointers only)

**This is a signpost, not a knowledge pack.** It carries **no standards-body content**:
no reproduced clauses, no normative text, no synthesised summaries of the standards.
EN 50126, EN 50128, EN 50129, and EN 50159 are paywalled with no redistribution grant
(Excluded under this repo's `docs/SOURCE-VETTING.md`), so they cannot be reconstituted
into a redistributable pack. What this skill does: tell you which document you want,
what it is for, who owns it, whether a free copy exists, and where to get the authentic one.

## When to use

You are working on railway RAMS, railway control software, or a signalling electronic
safety case and need to identify or cite the governing document: which standard covers
the RAMS process, which covers software, which covers safety-related electronic systems
for signalling, and which free text covers the risk-process need. Paywalled rows route
you to the owner. Free rows route you to the regulation or the ORR guidance. No row
names an in-repo pack.

**Prerequisites:** none, plain Markdown.

## How to use

Find your document below. The **Status** column says whether it can be packaged:

- **Excluded**: paywalled, no redistribution grant; buy from the owner. Cannot be packaged here.
- **Open**: free to obtain. No row in this signpost names an in-repo pack. Railway RAMS, railway software, and signalling electronic safety cases are not packaged in this catalogue.

CENELEC editions were confirmed on the EVS catalogue on 2026-10-14. No 2025 edition of EN 50128 was
found. EN 50129:2018 is withdrawn on EVS from 2026-06-02; EN 50129:2026 is the
incoming edition. Do not quote a date this file does not print.

## RAMS process (EN 50126)

| Designation | Title | Edition | Owner | Status | URL |
|-------------|-------|---------|-------|--------|-----|
| EN 50126-1:2017 | Railway applications - The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 1: Generic RAMS process. Amendment A1:2024 (EVS valid from 2024-12-02): https://www.evs.ee/en/evs-en-50126-1-2017-a1-2024 | 2017; A1:2024 | CENELEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/evs-en-50126-1-2017 |
| EN 50126-2:2017 | Railway Applications - The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Systems Approach to Safety. Amendment A1:2024 (EVS valid from 2024-12-16): https://www.evs.ee/en/evs-en-50126-2-2017-a1-2024 | 2017; A1:2024 | CENELEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/evs-en-50126-2-2017 |
| BS EN 50126-1:2017 | UK adoption of EN 50126-1:2017, the generic RAMS process. BSI Knowledge product page, paywalled. | 2017-11-30 | BSI | Excluded | https://knowledge.bsigroup.com/products/railway-applications-the-specification-and-demonstration-of-reliability-availability-maintainability-and-safety-rams-generic-rams-process |
| BS EN 50126-2:2017 | UK adoption of EN 50126-2:2017, systems approach to safety. BSI Knowledge product page, paywalled. | 2017-11-30 | BSI | Excluded | https://knowledge.bsigroup.com/products/railway-applications-the-specification-and-demonstration-of-reliability-availability-maintainability-and-safety-rams-systems-approach-to-safety |

## Software for railway control and protection (EN 50128)

| Designation | Title | Edition | Owner | Status | URL |
|-------------|-------|---------|-------|--------|-----|
| EN 50128:2011 | Railway applications - Communications, signalling and processing systems - Software for railway control and protection systems. No 2025 edition was found on the EVS catalogue on 2026-10-14. Amendment A1:2020: https://www.evs.ee/en/evs-en-50128-2011-a1-2020. Amendment A2:2020: https://www.evs.ee/en/evs-en-50128-2011-a2-2020 | 2011; A1:2020; A2:2020 | CENELEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/evs-en-50128-2011 |
| IEC 62279:2015 | Software for railway control and protection systems. IEC dual of the software standard, catalogue-present on EVS. Optional BSI software-path page, paywalled: https://knowledge.bsigroup.com/products/railway-applications-communication-signalling-and-processing-systems-software-for-railway-control-and-protection-systems | 2015 | IEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/iec-62279-2015 |

## Safety-related electronic systems for signalling (EN 50129)

| Designation | Title | Edition | Owner | Status | URL |
|-------------|-------|---------|-------|--------|-----|
| EN 50129:2018 | Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling. The scope text references concepts defined in EN 50126-1:2017. Corrigendum AC:2019-04: https://www.evs.ee/en/evs-en-50129-2018-ac-2019. Withdrawn on EVS from 2026-06-02; existing contracts still cite this edition. | 2018; AC:2019-04; withdrawn on EVS from 2026-06-02 | CENELEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/evs-en-50129-2018 |
| EN 50129:2026 | Railway Application - Communication, signalling and processing system - Safety related electronic systems for signalling. Incoming edition, EVS valid from 2026-06-02. | 2026 (EVS valid from 2026-06-02) | CENELEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/evs-en-50129-2026 |
| BS EN 50129:2018 | UK adoption of EN 50129:2018, safety related electronic systems for signalling. BSI Knowledge product page, paywalled. | 2019-05-31 | BSI | Excluded | https://knowledge.bsigroup.com/products/railway-applications-communication-signalling-and-processing-systems-safety-related-electronic-systems-for-signalling-1 |
| IEC 62425:2025 | Safety-related electronic systems for railway signalling. IEC dual of the signalling electronics standard, EVS valid from 2025-05-05. The 2007 edition was withdrawn on EVS on 2025-05-05: https://www.evs.ee/en/iec-62425-2007 | 2025 (EVS valid from 2025-05-05); 2007 withdrawn 2025-05-05 | IEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/iec-62425-2025 |

## Not the communication standard

| Designation | Title | Edition | Owner | Status | URL |
|-------------|-------|---------|-------|--------|-----|
| EN 50159:2010 | Safety-related communication in transmission systems. This is the communication standard. It is not EN 50129. | 2010 | CENELEC (catalogue: EVS) | Excluded | https://www.evs.ee/en/evs-en-50159-2010 |

## Free CSM and ORR paths

| Designation | Title | Edition | Owner | Status | URL |
|-------------|-------|---------|-------|--------|-----|
| Regulation (EU) No 402/2013 | Commission Implementing Regulation (EU) No 402/2013 of 30 April 2013 on the common safety method for risk evaluation and assessment, repealing Regulation (EC) No 352/2009: the free analogue for the EN 50126 risk-process need, and not an EN lifecycle or SIL table. CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32013R0402 | 2013-04-30; amended by 2015/1136 | European Commission | Open | https://www.legislation.gov.uk/eur/2013/402 |
| Regulation (EU) 2015/1136 | Commission Implementing Regulation (EU) 2015/1136 of 13 July 2015 amends 402/2013 and introduced harmonised design targets (ORR); it is not an EN substitute. CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32015R1136 | 2015-07-13 | European Commission | Open | https://www.legislation.gov.uk/eur/2015/1136 |
| Regulation (EU) No 1078/2012 | Commission Regulation (EU) No 1078/2012 of 16 November 2012 on the common safety method for monitoring; a free process companion, not an EN substitute. CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32012R1078 | 2012-11-16 | European Commission | Open | https://www.legislation.gov.uk/eur/2012/1078 |
| Regulation (EU) 2018/761 | Commission Delegated Regulation (EU) 2018/761 of 16 February 2018 establishing common safety methods for supervision by national safety authorities; a free process companion, not an EN substitute. CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32018R0761 | 2018-02-16 | European Commission | Open | https://www.legislation.gov.uk/eur/2018/761 |
| ORR CSM REA guidance | ORR guidance on the Common Safety Method for Risk Evaluation and Assessment (PDF, 16 December 2024): UK framing of the CSM REA method, not an EN lifecycle or SIL table. | 2024-12-16 | ORR | Open | https://www.orr.gov.uk/sites/default/files/2024-12/common-safety-method-for-risk-evaluation-and-assessment.pdf |
| ORR European-derived railway safety legislation | ORR page listing the European-derived railway safety legislation, including the CSM family and the 2015/1136 design targets; a framing page, not an EN substitute. | page current as fetched 2026-10-14 | ORR | Open | https://www.orr.gov.uk/guidance-compliance/rail/health-safety/laws/european-railway-safety-legislation |
| Regulation (EU) No 1077/2012 | Commission Regulation (EU) No 1077/2012 of 16 November 2012 on the common safety method for supervision by national safety authorities (legacy); a companion, not an EN substitute. CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32012R1077 | 2012-11-16 | European Commission | Open | https://www.legislation.gov.uk/eur/2012/1077 |
| Regulation (EU) 2018/762 | Commission Delegated Regulation (EU) 2018/762, the common safety method on safety management system requirements; a companion, not an EN substitute. CELEX: https://eur-lex.europa.eu/legal-content/en/TXT/?uri=CELEX%3A32018R0762 | 2018 | European Commission | Open | https://www.legislation.gov.uk/eur/2018/762 |
| Regulation (EU) No 1158/2010 | Commission Regulation (EU) No 1158/2010, the common safety method for assessing conformity with the requirements for railway safety certificates; a companion, not an EN substitute. CELEX: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32010R1158 | 2010 | European Commission | Open | https://www.legislation.gov.uk/eur/2010/1158 |
| Regulation (EU) No 1169/2010 | Commission Regulation (EU) No 1169/2010, the common safety method for assessing conformity with the requirements for railway safety authorisation; a companion, not an EN substitute. | 2010 | European Commission | Open | https://www.legislation.gov.uk/eur/2010/1169 |
| ORR Guide to ROGS | ORR Guide to the Railways and Other Guided Transport Systems (Safety) Regulations (PDF, July 2026 path): UK regulatory framing of how the CSMs sit under ROGS, not an EN substitute. | 2026-07 | ORR | Open | https://www.orr.gov.uk/sites/default/files/2026-07/guide-to-rogs-july-2026.pdf |
| ORR RM3 | ORR Risk Management Maturity Model guidance landing page: a maturity framing tool, not an EN substitute. | n/a | ORR | Open | https://www.orr.gov.uk/guidance-compliance/rail/health-safety/strategy/rm3 |

## RSSB catalogue, summaries only

| Designation | Title | Edition | Owner | Status | URL |
|-------------|-------|---------|-------|--------|-----|
| RSSB standards catalogue | Browseable catalogue of RIS, Rule Book modules, and guidance notes. Item pages carry a public summary of changes; full RIS/RGN PDFs sit behind login. Types explainer: https://www.rssb.co.uk/standards/types-of-standards-and-how-they-work. No specific free GE/GN alignment guide for EN 50126 was confirmed, so none is named here. | catalogue, not a single edition | RSSB | Open: item-page summaries only; full RIS/RGN PDFs require login | https://www.rssb.co.uk/standards-catalogue |
| RSSB standards hub | RSSB standards landing page, an explainer of the standards system rather than standard text. | n/a | RSSB | Open: explainer, not standard text | https://www.rssb.co.uk/standards |

## Scope & Limits

- No reproduced standards text. Rows carry designation, title, edition, owner, status, and URL only.
- No in-repo pack is the open path. Do not send a reader to `mil-std-882`, `faa-8110-49`, or `nhtsa-vehicle` as a railway equivalent.
- EN 50129 is safety-related electronic systems for signalling. EN 50159 is the communication standard.
- EN 50128 has no 2025 edition in this signpost. EN 50129 lists 2018 and 2026.
- CSM and ORR rows are the free risk-process and UK regulatory framing. They do not replace EN lifecycle, software, or safety-case content.
- RSSB full standards are not free. Catalogue summaries are.
- The IEC dual-number part designations for RAMS were not confirmed and are not cited.

---
*Signpost content is original JG Systems Consulting Ltd. work, MIT licensed. Trademarks and standard designations are named for identification only.*