Which of the following best describes the role of signals in crane operations near power lines?

In crane operations, especially when working near power lines, the role of signals is crucial for coordinating movements and ensuring safety. Communication between the crane operator and ground personnel, who use hand signals or radio communication, is essential to maintain the safe operation of the crane and prevent accidents that could occur due to miscommunication, particularly in the proximity of power lines. This coordination helps in effectively managing the crane's movements and keeping the load at a safe distance from electrical hazards, thus safeguarding the crew, equipment, and surrounding area.

Other options focus on different aspects that are not the primary concern of signaling in this context. For example, directing traffic might be relevant in certain situations, but it does not address the specific need for safety and coordination in crane operations. Similarly, evaluating operational efficiency or worker performance has less relevance to the immediate task of safely maneuvering the crane near potentially dangerous power lines. Therefore, the emphasis is on signals as a means of ensuring safe and effective coordination among the team during crane operations.