Standards Development

Scope

This document specifies methodologies for calculation of braking performance for railway rolling stock and is applicable to all countries.

This document describes the general algorithms/formulae using mean value inputs to perform calculations of braking performance in terms of stopping/slowing distances, stationary braking, power and energy for all types of rolling stock, either as single vehicles or train formations, with respect to the braking distance.

The calculations can be used at any stage of the development and assessment process (design, manufacturing, testing, verification, investigation, etc.) of railway rolling stock.

This document does not set out specific acceptance criteria (pass/fail). This document is not intended to be used as a design guide for selection of brake systems and does not specify performance requirements.

This document contains examples of the calculation of braking forces for different brake systems and calculation of stopping distance and stationary braking relevant to a single vehicle or a train. This document does not provide a method to calculate the extension of stopping distances when the level of available wheel/rail adhesion is exceeded (wheel slide activity).