Keep right
Drivers must pass to the right of the sign or obstruction.
Verified as Thai road sign บ.41 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Mandatory signs like Keep right tell you what you must do, not what's banned. The Thai exam likes to test that distinction. Run a few questions on it to lock in where the obligation begins, how far it extends, and how it reads in English vs. the icon you'll see on the road.
Now see it in questions.
Spotting Keep 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.
