California Car / Permit practice question · Road Signs
What does a yellow diamond-shaped sign with an S-shaped winding arrow mean?
Answer choices
- A roundabout (circular intersection) is ahead; slow down and prepare to yield.
- A series of three or more curves is ahead.— Correct answer
- The roadway becomes narrower ahead.
- A steep downgrade is ahead; use a lower gear and check your brakes.
Why this is the answer
A diamond-shaped sign with an S-shaped winding arrow is the Winding Road warning sign. It tells you the road ahead bends one way and then another, so slow down and stay in your lane. It does not warn about a roundabout, a narrowing road, or a steep downgrade, which each use their own signs.
Source: California Driver Handbook — Traffic Signs
Content reviewed against official driver handbooks · August 12, 2026
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