Speed limit (120 km/h)
Drivers must not exceed 120 km/h on the road section ahead. The limit applies until an end-of-restriction sign or a new speed limit sign is displayed. Foreign drivers should note that this is among the highest posted limits in Thailand and is typically found only on expressways or motorways.
Verified as Thai road sign บ.32-120 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Speed limit (120 km/h) is a "don't", and the Thai exam likes to probe the until-when part: where the prohibition lifts, what overrides it, and whether common driver workarounds are still legal. Practising it in context makes the answer obvious.
Now see it in questions.
Spotting Speed limit (120 km/h) 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.
