When is the mode change boundary for movement into Yard territory reached?

The mode change boundary for movement into Yard territory is reached when the front of the train enters Yard territory. This is because the point at which the front of the train crosses into Yard limits signifies that the train is now operating within an area where different rules and procedures apply, often related to slower speeds and increased operational safety measures. Such decision points are crucial for ensuring that all movements are conducted safely and in compliance with the specific regulations governing Yard operations.

In railway operations, the definition of boundaries is significant for maintaining safe distances, particularly in areas with conflicting train movements. Recognizing this boundary allows operators to adjust their actions appropriately, emphasizing the importance of where the train's leading edge is in relation to control points. This ensures that the train crew and yard personnel are aware of the current operating environment and can coordinate movements safely.