How should a train proceed when its speed is reduced below 25 mph while approaching an automatic interlocking?

When a train's speed is reduced below 25 mph while approaching an automatic interlocking, it is required to proceed prepared to stop at the interlocking signal. This directive emphasizes maintaining a cautious approach as trains near signaling systems that control movement through junctions or crossings. The rationale for this requirement is to ensure safety and allow the train crew to react promptly to any signals displayed, which can indicate whether to stop, proceed, or take specific actions based on the situation at the interlocking.

Operating under a precautionary principle is crucial, as unexpected conditions can arise, requiring immediate and appropriate responses from the train crew. By preparing to stop, the train can ensure compliance with signaling instructions, thus avoiding potential accidents or undesirable situations.