Final answer:
The train operator can request the correct route by stopping at the signal and pressing the button.
Step-by-step explanation:
When the signal indicates the wrong route or stop, the train operator can request the correct route by stopping at the signal and pressing the button. By pressing the route request button, the train operator signals the control center that they require a different route. This allows the control center to make the necessary adjustments to the track switches and ensure that the train takes the correct route.