What must be done if a crew member needs to clear signals at a manual interlocking?

When a crew member needs to clear signals at a manual interlocking, it is essential to receive prior approval from the control operator. This protocol ensures that the movement is coordinated and safe, maintaining the integrity of train operations and reducing the risk of accidents. The control operator has the authority and responsibility for managing train movements and ensuring that all signals are properly set for safe train passage.

Obtaining approval allows for any necessary precautions to be taken, such as notifying other train crews or adjusting timetable requirements. This step is crucial in a manual interlocking scenario where communication and coordination are key to maintaining safe operations on the railroad.