Deriving a generic system definition for railway risk assessments applied to BP-risk

This paper presents a generic system definition for a new semi-quantitative approach for railway risk assessments, called Best Practice-Risk (BP-Risk). The basis for the generic system definition is the draft European Standard prEN 15380 part 4, which describes function groups for rail vehicles. Based on an analysis of the functional interfaces, additional trackside (signalling) functions were defined. This procedure can be extended to define additional trackside functions within the entire railway system.