Maximum weight 25 tonnes
Vehicles with a total weight exceeding 25 tonnes are prohibited from passing this point. Typically used to protect bridges, weight-sensitive road segments, and weak embankments.
Verified as Thai road sign บ.33 (25 ตัน) from Department of Rural Roads sign series on 2026-05-15.
Study guide
Connect this sign to practice
Maximum weight 25 tonnes 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 Maximum weight 25 tonnes 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.
