Turn left or right only
Drivers must turn left or right at the junction ahead and must not continue straight.
Verified as Thai road sign บ.45 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Turn left or right only sets a positive obligation, and exam questions usually probe two things: when it starts and what would override it. Practising it in the question flow makes both crisp.
Now see it in questions.
Spotting Turn left or right only 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.
