How must track cars approach interlocking and CP signals?

Track cars must approach interlocking and crossing protection (CP) signals prepared to stop. This is critical because interlockings and CP signals are key safety features that manage train movements and ensure that trains can safely navigate through junctions or crossovers. By being prepared to stop, operators can respond appropriately to indications from the signals that may require them to halt, such as red signals or indications of conflicting movements.

The requirement to be prepared to stop emphasizes safety over speed, as the situation at interlockings can change rapidly and may involve other trains or maintenance activities. This cautious approach ensures that operators can make timely decisions that prioritize both their safety and the safety of other rail traffic.

In contrast, approaches that suggest proceeding at maximum speed or not reducing speed do not align with the safety protocols required at these critical locations. Likewise, 'proceeding with caution' does not underscore the necessity of being ready to stop, which is paramount in these situations. Thus, the emphasis on being prepared to stop is essential for maintaining operational safety when approaching interlocking and CP signals.