No entry
A solid red disc with a horizontal white bar. Vehicles are prohibited from entering the road or section beyond this sign. Most often used at the wrong-way end of a one-way street.
Verified as Thai road sign บ.5 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Knowing what No entry means is the easy half. The harder half is which exceptions apply: emergency vehicles, residents, time-of-day rules. The Thai exam asks about exactly those. Run a few questions to lock it in.
Now see it in questions.
Spotting No entry 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.
