2. REQUIREMENTS SPECIFIC TO EACH SUBSYSTEM
2.1. Infrastructure
2.1.1. Safety
2.2. Energy
2.2.1. Safety
2.2.2. Environmental protection
2.2.3. Technical compatibility
2.3. Control and command and signalling
2.3.1. Safety
2.3.2. Technical compatibility
2.4. Rolling stock
2.4.1. Safety
2.4.2. Reliability and availability
2.4.3. Technical compatibility
2.4.4. Controls
2.5. Maintenance
2.5.1. Health and safety
2.5.2. Environmental protection
2.5.3. Technical compatibility
2.6. Operation and traffic management
2.6.1. Safety
2.6.2. Reliability and availability
2.6.3. Technical compatibility
2.7. Telematics applications for freight and passengers
2.7.1. Technical compatibility
2.7.2. Reliability and availability
2.7.3. Health
2.7.4. Safety