High-occupancy vehicle lane
The marked lane is reserved for vehicles carrying at least the number of occupants shown on the sign.
Verified as Thai road sign บ.50 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Mandatory signs like High-occupancy vehicle lane 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 High-occupancy vehicle lane 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.
