What must a train do when approaching an unattended fusee burning on or near its track?

When a train approaches an unattended fusee that is burning on or near its track, the train must stop and then proceed at restricted speed for a distance of one mile. The fusee serves as a warning signal indicating a potential hazard ahead, often related to track maintenance or other obstructions.

The requirement to stop ensures that the crew can assess the situation safely and determine whether it is safe to proceed. Proceeding at restricted speed allows the train to navigate through the area carefully, typically requiring the crew to be prepared to stop within half the distance of their sighting. This is a critical safety measure, as it ensures that any unforeseen obstacles or hazards can be dealt with appropriately, thereby enhancing the overall safety of train operations in the vicinity of the warning signal.