How is train delocalization determined?

Train delocalization is a safety terminology used to describe a situation where the train’s precise location cannot be accurately determined by the monitoring systems. This situation typically arises in scenarios involving a loss of data connectivity or critical operational parameters.

One primary cause that leads to train delocalization is when a train goes into emergency braking, resulting in the loss of stationing numbers. During emergency braking, the train system may not be able to communicate its current position effectively, which can compromise the integrity of location data and render the train delocalized.

In contrast, the other scenarios presented are less directly related to the specific phenomenon of delocalization due to the immediate, impactful nature of emergency braking that affects data transmission and tracking directly. For example, while traveling past the maximum speed limit may indicate a violation of operational parameters, it does not inherently cause a loss of location data. Similarly, a sudden power failure might interrupt systems but doesn’t specifically cause delocalization as a defined data loss event. Finally, not having the train's location updated for over 10 minutes indicates a potential tracking issue but doesn't necessarily mean the train is delocalized—it may just indicate delayed updates without loss of information.

Thus, the connection between emergency braking and the resultant loss