No carts
Carts are not permitted on the road ahead. Drivers must not bring any cart onto this section of road. Note that this prohibition applies for the full stretch until an end-of-restriction or cancellation sign is displayed.
Verified as Thai road sign บ.21 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
No carts 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 No carts 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.
