Automated train driving: risk analysis validation

Abstract

Aim. The paper is dedicated to describing the validation of risk analysis as part of an automated train control research project. Methods. Validation was performed using several different methods. The obtained results were compared with those obtained from other sources. Additionally, an independent risk analysis was performed using the alternative MEM (minimum endogenous mortality) method. Results. The validation showed that the project’s findings are reliable. Safety Integrity Levels (SIL) 1 or 2 were confirmed for train driver substitution systems. Conclusions. It was shown that various methods should be used for the purpose of risk analysis validation. It must be taken into account that comparable, but not identical results will be obtained.