No changing lanes to the right
Drivers must not change lanes to the right where this sign is posted. Remain in your current lane until the restriction no longer applies. Foreign drivers should note that lane-change rules are enforced on both expressways and ordinary roads.
Verified as Thai road sign บ.11 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Prohibition signs like No changing lanes to the right 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 changing lanes to the right 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.
