What should an employee do when in doubt about the meaning of a signal?

When an employee is uncertain about the meaning of a signal, stopping all movements immediately is a critical safety measure. This action helps prevent potential accidents or misunderstandings that could arise from misinterpreting a signal. By halting operations, the employee ensures that no further risks are taken while clarifying the situation.

In the context of railway operations, signals are crucial for safe train movement and must be clearly understood. Stopping allows time for the employee to assess the situation, seek clarification, or investigate the signaling system without putting themselves or others in danger. This approach reflects a commitment to safety protocols and reinforces the importance of clear communication and understanding in high-stakes environments like railroads.