When should a train operator use the route request button?

The route request button is an essential tool that train operators use to communicate with the signaling system regarding the train's intended path. The most appropriate time to use this button is when the signal indicates "stop."

In this situation, the operator needs to inform the control center of their intent to proceed once it is safe to do so. Pressing the route request button while a stop signal is displayed is crucial for ensuring proper signaling and routing of the train. It allows for the safe management of train movements and helps avoid potential conflicts on the railway network.

Using the button at other times, such as when the train is at full speed, approaching a station, or switching tracks, may not provide the necessary safety checks and communications needed for safe operations, as these situations involve different protocols and conditions that the operator must follow. Therefore, pressing the route request button specifically under the "stop" signal condition emphasizes the importance of adhering to signaling protocols for safety and efficient rail operations.