No bicycles
Bicycles are not permitted to enter or travel on the road ahead. Riders must find an alternative route. This sign is common near expressways and high-speed roads where bicycles are considered a hazard.
Verified as Thai road sign บ.20 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Prohibition signs like No bicycles carry instant fines on the road and trick wording on the exam. Questions test where the rule starts, where it ends, and which adjacent signs cancel it. Practising it in the question flow keeps those edges fresh.
Now see it in questions.
Spotting No bicycles 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.
