Final answer:
When approaching a railroad crossing without signals, drivers should look, listen, and slow down for safety.
Step-by-step explanation:
The statement "When approaching a railroad crossing that has no warning signals, a driver should look, listen and slow down" is true.
When approaching a railroad crossing without warning signals such as electric flashing lights or gates, drivers should exercise caution. They should look both ways to check for any oncoming trains and listen for any sounds of approaching trains. Additionally, they should reduce their speed in order to have enough time to react if a train is coming.
By following these precautions, drivers can ensure their safety and the safety of others when crossing the railroad tracks.