Who can apply or remove Blue Signal Protection?

The correct answer indicates that Blue Signal Protection can only be applied or removed by a person from the same group or craft that displayed the signals. This rule is in place to ensure safety and accountability. The individuals authorized to apply or remove Blue Signal Protection are typically those who have a direct role in the operations of the equipment being protected. This prevents confusion and ensures that only those who are actively involved in maintaining or working on a train or maintenance-of-way operation can affect its safety status.

This protocol helps to minimize the risk of accidents, as it requires a clear chain of responsibility and communication among those working in close proximity to the equipment. The principle is to keep safety measures within the jurisdiction of those who are familiar with the work being done, thereby enhancing on-site safety protocols.

In contrast, the other options either over-extend the authority to individuals who may not be directly involved or limit it to an excessively small group. This balance is crucial in creating a safe working environment on the railways.