Which statement about railroad-crossing signals is correct?

Correct answer: A. – Flashing lights mounted on a crossbuck indicate that a train is coming
Flashing lights on a railroad crossbuck indicate an approaching train. Stop and remain stopped until the train has passed, the lights have stopped flashing, and all tracks are clear. A lack of horn noise does not establish that crossing is safe because some crossings are in quiet zones.
Source: Oklahoma Driver Manual — Ch. 4, “Railroad Warning Signs—Round Yellow & Black Sign or Black & White Crossbucks”





