Who should be notified if a blue flag is observed?

The presence of a blue flag is a critical safety indicator that signifies an area is restricted or that work is being performed on or near the tracks. Therefore, it is essential for specific personnel to be notified to ensure safety protocols are followed. The Trainmaster and Yard Supervisor are responsible for overseeing operations and ensuring that all safety measures are adhered to. This includes the management of blue flags, which indicate that the area must not be entered or that trains must not move through the designated zone.

Notifying only the conductor does not encompass the broader operational safety responsibilities that the Trainmaster and Yard Supervisor manage. Additionally, local police are not typically involved unless there are safety or emergency concerns beyond normal operations. Thus, the correct protocol for the observance of a blue flag is to alert those in charge of operational safety directly, namely the Trainmaster and Yard Supervisor. This ensures that proper precautions are taken promptly, protecting both the workers and the rail operations involved.