How many short blasts should a train operator blow on the whistle when observing two yellow caution lanterns displayed adjacent to the track?

When a train operator observes two yellow caution lanterns displayed adjacent to the track, it indicates a warning that the train needs to proceed with caution. The protocol for this situation specifies that the operator should respond with two short blasts of the whistle.

This action serves as a communication signal, alerting anyone in the vicinity or those responsible for maintaining safety measures that the train is approaching a potentially hazardous area. The use of two short blasts is standardized in signaling systems to convey specific operational messages, ensuring clarity and uniformity among train operators and crew members.

This practice aligns with established safety protocols designed to enhance awareness and promote safe train operations. Understanding these signals is crucial for any train operator to ensure both the safety of the crew and passengers, as well as the integrity of the overall rail system.