Final answer:
It is true that drivers should look, listen, and slow down when approaching an unmarked railroad crossing to ensure safety for themselves and pedestrians.
Step-by-step explanation:
When approaching a railroad crossing that has no warning signals, such as electric flashing lights or gates, it is true that a driver should look, listen, and slow down. The absence of traffic signals can pose a risk not only to drivers but also to pedestrians, especially in areas where students and others frequently cross. A driver must be vigilant in these situations to ensure not only their own safety but also that of others who may be in the vicinity of the crossing.