What speed must a train operate at while making a reverse movement beyond the block limits?

A train making a reverse movement beyond the block limits must operate at Restricted Speed until authorized by the Dispatcher. This rule is in place primarily for safety reasons. When a train is moving in reverse beyond designated block limits, it may encounter unforeseen circumstances such as other trains, track obstructions, or signal indications that are not visible. Restricted Speed, defined as the maximum speed at which a train can move while being able to stop within half the range of vision, allows for more cautious operations in potentially hazardous or unknown situations.

By adhering to this procedure, the train crew can ensure they maintain greater control over the train's movement while being prepared for any unexpected developments that might arise on the tracks ahead. This mitigates the risk of accidents during reverse movements, especially in areas where track conditions and signals may not be as readily apparent.