What actions should be taken regarding a blue flag?

When a blue flag is displayed, it signifies that workers are present on or near the tracks, indicating that the area is not safe for trains to operate. This flag serves an important safety function and is a signal for others in the vicinity to be aware of the potential hazards due to ongoing work.

The correct action in this scenario is to notify the Yard Supervisor and Train Dispatcher. This communication ensures that all relevant personnel are informed about the presence of workers and the state of the track, which is crucial for maintaining safety protocols and preventing accidents. By notifying the proper authorities, it allows for an organized response that protects both the workers and train operations.

In contrast, moving silently past it does not adequately address the safety concerns that the blue flag represents. Similarly, charging or cutting cars immediately could endanger workers who may be around the train tracks and is contrary to the safety protocols implied by the presence of the blue flag. Hence, proper communication with authority figures takes precedence in ensuring safety measures are upheld.