No overtaking
Overtaking another vehicle is prohibited on the road section where this sign is posted. Drivers must remain behind vehicles ahead until the restriction ends or an end-of-restrictions sign is posted.
Verified as Thai road sign บ.4 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Prohibition signs like No overtaking carry instant fines on the road and trick wording on the exam. Questions test where the rule starts, where it ends, and which adjacent signs cancel it. Practising it in the question flow keeps those edges fresh.
Now see it in questions.
Spotting No overtaking 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.
