Why must advance watchmen carry flags and fuses?

Advance watchmen carry flags and fuses primarily as a safety measure to attempt to stop trains if their signals are not acted upon. The use of flags serves as a visual signal to approaching train crews, while fuses provide an additional method of alerting crews, especially in situations where visual contact might be limited. The job of the advance watchman is crucial for preventing accidents, as they are positioned to warn and protect roadway workers from oncoming trains. Thus, these tools are essential for enhancing the safety of the work zone by providing advance warnings to both train operators and other workers present.