RIS-2774-RST Iss 1

This document sets out requirements for the application of probabilistic gauging based on Monte Carlo methods to calculate clearances between rolling stock and infrastructure and passing clearances between rolling stock.

The use of probabilistic gauging assessment methodology provides opportunities to support the avoidance of fouls by associating a probability with the likelihood of fouling. Probabilistic gauging techniques are available to use in the GB rail industry and have the potential to enable cost-efficient introduction of new rolling stock by calculating more representative clearances than current absolute gauging methodologies.  

The RIS will provide a standard industry approach for applying Monte Carlo methods in probabilistic gauging assessments. It sets out the scope, process, input and outputs of the method and provides guidance to support consistent application. 

The methodology set out in the RIS supports the wider adoption and more efficient use of probabilistic gauging processes. This enables a reduction of unnecessary infrastructure alteration works and provide efficiencies in the gauging assessment and verification process.  

This document is intended to be used by any stakeholders who are undertaking clearance assessments. 

DGA251033-V00-XLS001-Iss3

DGA251033-V00-RPT001-Iss3