1. EN 50126 Railways applications-The specification and demonstration of reliability, availability, maintainability and safety (RAMS) 2000
2. EN 50128 Railways applications-Communication, signalling and processing systems-Software for railway control and protection systems 2011
3. EN 50129 Railways applications-Communication, signalling and processing systems-Safety related electronic systems for signalling 2003
4. IEC 61508 Functional safety of E/E/PE safety-related systems 2011
5. prEN50126 Railways applications-The specification and demonstration of reliability, availability, maintainability and safety (RAMS) 2015