Final answer:
The operator of the train is required to follow speed limits and slow down when approaching curves or crossings. They must also be vigilant and monitor the tracks for signals or obstructions.
Step-by-step explanation:
In addition to blowing the required whistle signal when passing yellow caution lanterns, the operator of the train is required by the rules to obey any applicable speed limits and slow down when approaching curves or crossings.
The operator must also be vigilant and constantly monitor the tracks, looking out for any signals or obstructions that could pose a danger to the train or its passengers.