Who should perform spot checks to ensure affected stations have notices posted during diversions?

The correct choice, station supervisors, is crucial in the context of managing station operations, particularly during diversions. Station supervisors hold a managerial role that encompasses overseeing daily operations and ensuring compliance with safety and communication protocols. By performing spot checks, they can confirm that appropriate notices are displayed in affected stations, which is essential for keeping passengers informed about changes in schedules or services.

Their position allows them to make real-time decisions and address any issues that may arise related to the implementation of diversions. They also serve as a point of coordination between the train operators, field office staff, and frontline employees, ensuring that information flows smoothly and that issues can be resolved quickly. Their oversight ensures the integrity of communication and enhances the overall passenger experience during service disruptions.

In contrast, other roles like porters and station agents may not have the same level of authority or responsibility for compliance with communication standards during diversions, while field office staff typically focus on broader operational management rather than on-the-ground checks at individual stations.