Ensuring requirements for the operational safety of the metro

The accident investigation revealed that the safety device design included a fault that has
been carried across two generations of devices.

Helsinki City Transport and the safety device supplier should investigate and analyse the requirements relating to the operational safety of the metro railway system thoroughly in order to avoid potential faults being carried across to the next system in the course of the current safety device revision.

Metropolitan Area Transport Ltd has specified its requirements in asset management and the latest changes to interlocking and safety equipment. More development measures at different levels are under way as part of the Metro Capacity and Reliability Improvement Project (METKA). It pays special attention to documentation, requirements and risk management, etc. The project is advancing to the implementation phase. The train control system will be introduced on the eve of the 2030s.