Railroad Advance Warning

railroad sign · circle · yellow

A railroad crossing is ahead. Slow down, look, listen, and be ready to stop.

Visual breakdown: Round yellow sign with a black X and two Rs (RXR).
Shape recognition: The only round warning sign — the circle is reserved for railroad advance warnings.
Color recognition: Yellow = general warning, giving you distance to prepare before the crossbuck at the tracks.
Memory trick: Round like a train wheel — the wheel warns you the wheels are coming.
Real-world example: You see the round RXR sign 300 feet before tracks hidden by a curve; it's your cue to slow before you can even see the rails.
Common mistakes: Confusing it with the crossbuck. The round RXR sign warns in advance; the X-shaped crossbuck marks the tracks.
Quick recall method: Round RXR = tracks ahead; X crossbuck = tracks here.

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1 practice question cover this sign.