Transportation & Mobility
Moving millions of people and tonnes safely, on time. Rail is one of the world's largest users of functional safety (SIL 4 signalling), alongside airports, ports and tunnels — all critical infrastructure, heavily automated and cyber-exposed.
The main families
Signalling & control
ERTMS/ETCS, interlockings, automatic train control. SIL 4 safety, EN 50126/50128/50129. Driverless metros (GoA4).
Logistics & handling
Baggage handling, landing aids, automated container terminals and cranes, port AGVs. High density of automation and SCADA.
Safety & traffic management
Ventilation and smoke extraction, fire detection, traffic management. Tunnel directive 2004/54/EC after the Mont Blanc disaster.
Key challenges
- SIL 4 signalling — rail pushes functional safety to its maximum (SIL 4). Interlockings, ETCS, speed control: no failure may permit a hazardous movement.
- Automation — driverless metros (GoA4), automatic train operation, centralized supervision. Reliability and punctuality as contractual requirements.
- Tunnel safety — ventilation, smoke extraction, fire detection and evacuation, governed by directive 2004/54/EC after Mont Blanc.
- Cybersecurity — critical infrastructure under NIS2; signalling, ticketing and supervision become targets.
Key technologies
Standards & references
Rail applies the EN 50126 / 50128 / 50129 derivation (RAMS, software, signalling systems) from IEC 61508, the ERTMS/ETCS system, and IEC 62290 for urban guided-transport automation.
Major players
Rolling stock & signalling
Alstom, Siemens Mobility, Hitachi Rail, Thales, Wabtec, CAF, Stadler.
Airports
Vanderlande, Siemens Logistics, BEUMER, Thales (ATM).
Ports
Kalmar, Konecranes, ABB, Liebherr.
Operators
SNCF, Deutsche Bahn, RATP, Renfe, Network Rail.
Landmark accidents
Major rail accidents have each reinforced signalling, speed control or the treatment of human factors.
| Event | Year | Location | Lesson |
|---|---|---|---|
| Santiago de Compostela | 2013 | Spain | Derailment at excessive speed in a curve; 80 deaths. The section was not covered by automatic speed control. Highlighted the need for continuous protection (ETCS). |
| Bad Aibling | 2016 | Germany | Head-on collision; 12 deaths. A dispatcher manually overrode the signalling. A textbook case of human factors and the limits of manual override. |