How may a train make a reverse movement within the limits of the same block?

The requirement for a train to move at Restricted Speed when making a reverse movement within the limits of the same block is essential for safety and operational integrity. Restricted Speed allows the train to operate in a manner that is safe for the circumstances and conditions present on the line. This means the crew must be prepared to stop within the distance that can be seen ahead, which is critical in any scenario where unexpected obstacles or changes in track conditions might be present.

Moving at Restricted Speed ensures that the crew has maximum control over the train and can react appropriately to any potential hazards, such as other rail traffic, track work, or obstructions. This is particularly important during reverse movements, which might introduce additional complexities or visibility concerns.

The other choices, while they may suggest actions that could be taken during train operations, do not directly address the critical safety measures required for reverse movements specifically. The involvement of a crew member or dispatcher may be necessary in certain scenarios, but the fundamental safety protocol remains the requirement to operate at Restricted Speed.