How should movements be made when entering or moving within non-signaled yard limits?

Answer: B — Restricted speed

When entering or moving within non-signaled yard limits, the movements must be made at a restricted speed. This means that trains and rail cars must be able to stop within half the distance of what they can see ahead of them. The concept of restricted speed is crucial in these scenarios because it ensures the safety of both the train crew and any personnel or equipment that may be present in the yard. Restricted speed allows for a cautious approach, accommodating the potential for obstacles, other trains, or unexpected conditions that may arise in a non-signaled area. By following this rule, operators can effectively manage risks in environments where visual cues are the primary means for safe navigation instead of signals. This approach emphasizes the importance of maintaining a prudent pace that allows for immediate reactions to situational changes within the yard limits.