No left turn
Turning left is prohibited at this intersection or for the road segment that follows. The driver must continue straight or take a permitted alternative direction.
Verified as Thai road sign บ.8 from Department of Rural Roads sign series on 2026-05-15.
Study guide
Connect this sign to practice
No left turn is one of the prohibition signs candidates lose marks on. Not because the symbol is unfamiliar, but because the question reframes the scenario. Practising it in the flow surfaces those reframings before test day.
Now see it in questions.
Spotting No left turn 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.
