Y-junction ahead
A Y-shaped junction is ahead. Reduce speed and be prepared to give way or merge, as the road splits or joins at an angle. Foreign drivers should watch carefully, as the correct lane to take may not be immediately obvious.
Verified as Thai road sign ต.12 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Warning signs like Y-junction ahead test whether you spot the hazard early enough to react. The Thai theory exam often pairs them with stopping-distance, visibility, and right-of-way questions, so practising the symbol alongside its scenarios makes the wording less of a trap.
Now see it in questions.
Spotting Y-junction ahead 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.
