What should a train operator do when approaching a home signal displaying three yellow lights?

When approaching a home signal displaying three yellow lights, the correct action for a train operator is to proceed with caution without stopping. Three yellow lights typically indicate that the train is approaching a signal where the next signal may be red (stop). This means the operator should be prepared to reduce speed and be ready to stop if necessary, but there is no requirement to stop immediately at the yellow signal itself.

Selecting to stop the train and contact the rail control center, as indicated in the first choice, is unnecessary in this situation unless there are specific concerns or malfunctions. The three yellow lights serve as a warning, prompting a cautious approach rather than a full stop.

Speeding up to ensure timely arrival is inappropriate, as it contradicts the caution advised by the signal. Ignoring the signal because there are no other trains is also a safety risk; signals must always be obeyed regardless of the perceived circumstances. Therefore, proceeding with caution allows the operator to maintain safety while being prepared to respond to any changes in signal status.