What must a Dispatcher do to ensure safety when foul time is requested?

When foul time is requested, it is essential for the Dispatcher to apply blocks to the controls of switches and signals leading to the affected track as a critical safety measure. This action serves to prevent any train movements onto the track that could endanger personnel who may be working on or near it.

By applying blocks, the Dispatcher is effectively creating a physical barrier that ensures that trains cannot access the track while work is being conducted. This is a fundamental safety protocol that protects workers from the potential hazards of moving trains, thus maintaining a safe working environment.

While other safety practices, such as checking weather conditions or ensuring that personnel are accounted for, are also important in different contexts, they do not directly address the immediate safety concerns associated with foul time. Ensuring that maintenance staff are present may also be relevant; however, it does not provide the same critical protective measure as applying the blocks. The core requirement during foul time is to ensure that the track is secured against any train movements, making the application of blocks the most vital action in this context.