U-turn point ahead on the left
A U-turn opening or U-turn point is ahead on the left. Drivers who need to turn around should prepare early, reduce speed, and move into the correct lane when safe.
Verified as Thai road sign ต.51 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
U-turn point ahead on the left is a hazard cue, not a rule. On the Thai exam that distinction matters. Run a few questions to see how the scenario gets framed: which way to slow, who has priority, and what the next sign is likely to be.
Now see it in questions.
Spotting U-turn point ahead on the left in isolation is one thing. Recognising it inside a real exam-style question, among lookalikes and trick wording, is another. The diagnostic mixes it in for you.
