EN 14531-1:2015/prA1:2016

Railway applications - Methods for calculation of stopping and slowing distances and immobilization braking - Part 1: General algorithms utilizing mean value calculation for train sets or single vehicles

This European Standard describes general algorithms for the brake performance calculations to be used for all types of train sets, units or single vehicles, including high speed, locomotive and passenger coaches, conventional vehicles and wagons.
This European Standard does not specify the performance requirements. It enables the estimation and/or comparison by calculation of the various aspects of the performance: stopping or slowing distances, dissipated energy, power, force calculations and immobilization braking.
If it is required to validate, verify or assess braking performance it is recommended that a more detailed calculation is performed in accordance with FprEN 14531-2, i.e. a step by step calculation.
This European Standard contains generic examples of the calculation of brake forces for individual brake equipment types and calculation of stopping distance and immobilization braking relevant to a train (see Annexes C and D).

Bahnanwendungen - Verfahren zur Berechnung der Anhalte- und Verzögerungsbremswege und der Feststellbremsung - Teil 1: Allgemeine Algorithmen für Einzelfahrzeuge und Fahrzeugverbände unter Berücksichtigung von Durchschnittswerten

Applications ferroviaires - Méthodes de calcul des distances d'arrêt, de ralentissement et d'immobilisation - Partie 1 : Algorithmes généraux utilisant le calcul par la valeur moyenne pour des rames ou des véhicules isolés

Železniške naprave - Metode za izračun zavornih poti pri ustavljanju in upočasnjevanju ter zavarovanje stoječih vozil - 1. del: Splošni algoritmi, ki temeljijo na izračunu srednje vrednosti za vlakovne kompozicije ali posamezna vozila

General Information

• Status: Not Published
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: CEN/TC 256 - Railway applications
• Drafting Committee: CEN/TC 256/SC 3/WG 47 - Braking
• Current Stage: 4097 - End of interruption of work - split/merged
• Start Date: 05-Jul-2018
• Completion Date: 11-Feb-2026
• Directive: Not Harmonized2008/57/EC - DIRECTIVE 2008/57/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: SIST EN 14531-1:2016/oprA1:2017 - Railway applications - Methods for calculation of stopping and slowing distances and immobilization braking - Part 1: General algorithms utilizing mean value calculation for train sets or single vehicles

Relations

• Merged Into: EN 14531-1:2015+A1:2018 - Railway applications - Methods for calculation of stopping and slowing distances and immobilization braking - Part 1: General algorithms utilizing mean value calculation for train sets or single vehicles
• Effective Date: 19-Jan-2023
• Amends: EN 14531-1:2015 - Railway applications - Methods for calculation of stopping and slowing distances and immobilization braking - Part 1: General algorithms utilizing mean value calculation for train sets or single vehicles
• Effective Date: 08-Jun-2016

Overview

EN 14531-1:2015/prA1:2016 is a pivotal European Standard developed by CEN (European Committee for Standardization) for the railway industry. The standard outlines the methods for calculating stopping distances, slowing distances, and immobilization braking by employing general algorithms based on mean value calculations. This document is applicable to all types of train sets and individual railway vehicles, including high-speed trains, locomotives, passenger coaches, conventional rolling stock, and freight wagons.

The standard does not set specific braking performance requirements, but rather provides a common foundation for estimating and comparing key braking performance parameters through standardized calculation methods. This ensures consistency and reliability in safety and performance assessments across a broad spectrum of railway applications.

Key Topics

The primary topics covered in EN 14531-1:2015/prA1:2016 include:

• General algorithms for brake performance calculations: Utilizes mean value calculations to estimate stopping and slowing distances for various types of railway rolling stock.
• Calculation of stopping and slowing distances: Provides methodologies to determine how far a train or single vehicle will travel before coming to a complete stop or slowing to a particular speed.
• Immobilization braking: Methods for calculating the braking required to keep a stationary vehicle or train securely immobilized.
• Estimation of dissipated energy and brake forces: Enables the calculation of energy dissipated during braking and the total brake force required under different operational scenarios.
• Generic calculation examples: Annexes include sample calculations for different brake equipment and scenarios, supporting consistent implementation and verification.

Note: The standard recommends more detailed, step-by-step analysis per FprEN 14531-2 for precise validation, verification, or assessment of braking performance.

Applications

This standard is intended for widespread use in the European railway sector, providing essential algorithms and calculation methods for:

• Rolling stock manufacturers: Ensuring new train sets, locomotives, and wagons meet uniform braking calculation protocols during design and testing.
• Railway operators and infrastructure managers: Supporting operational planning and safety analysis by enabling accurate assessment and comparison of train braking capabilities.
• Maintenance and engineering teams: Facilitating system upgrades and modifications through standardized calculation frameworks.
• Regulatory bodies and certification organizations: Assisting with compliance checks against European interoperability and safety directives through recognized calculation methodologies.
• Technical consultants and risk analysts: Enabling independent analysis and safety case development for rolling stock and railway projects.

By providing a harmonized approach, EN 14531-1 enhances interoperability, supports cross-border train operations, and strengthens rail safety across Europe.

Related Standards

For comprehensive brake performance evaluation and compliance, the following related standards should be considered alongside EN 14531-1:2015/prA1:2016:

• EN 14531-2: Railway applications - Braking - Calculation of stopping and slowing distances and immobilization braking - Part 2: Step-by-step calculation for more detailed analysis and assessment.
• EN 16452: Outlines specific requirements for brake blocks, referenced in the determination of coefficient of friction in the calculation methods.
• UIC 541-3: Provides general conditions for approval of brake pads and disc brakes; methods referenced when specific standards are unavailable.

By utilizing EN 14531-1 and associated standards, stakeholders in the railway sector ensure accurate, consistent, and reliable calculations of braking performance, which are critical for safety, design validation, and regulatory compliance.

Keywords: EN 14531-1, railway braking, stopping distance calculation, immobilization braking, railway safety standards, CEN, rolling stock brake algorithms, European railway interoperability.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2017
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Railway applications - Methods for calculation of stopping and slowing distances and
immobilization braking - Part 1: General algorithms utilizing mean value calculation for
train sets or single vehicles
Bahnanwendungen - Verfahren zur Berechnung der Anhalte- und
Verzögerungsbremswege und der Feststellbremsung - Teil 1: Allgemeine Algorithmen für
Einzelfahrzeuge und Fahrzeugverbände unter Berücksichtigung von
Durchschnittswerten
Applications ferroviaires - Méthodes de calcul des distances d'arrêt, de ralentissement et
d'immobilisation - Partie 1 : Algorithmes généraux utilisant le calcul par la valeur
moyenne pour des rames ou des véhicules isolés
Ta slovenski standard je istoveten z: EN 14531-1:2015/prA1:2016
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 14531-1:2015
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
December 2016
ICS 45.060.01
English Version
Railway applications - Methods for calculation of stopping
and slowing distances and immobilization braking - Part 1:
General algorithms utilizing mean value calculation for
train sets or single vehicles
Applications ferroviaires - Méthodes de calcul des Bahnanwendungen - Verfahren zur Berechnung der
distances d'arrêt, de ralentissement et Anhalte- und Verzögerungsbremswege und der
d'immobilisation - Partie 1 : Algorithmes généraux Feststellbremsung - Teil 1: Allgemeine Algorithmen für
utilisant le calcul par la valeur moyenne pour des Einzelfahrzeuge und Fahrzeugverbände unter
rames ou des véhicules isolés Berücksichtigung von Durchschnittswerten
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 256.

This draft amendment A1, if approved, will modify the European Standard EN 14531-1:2015. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turke
...