prohibition sign
No bicycles
Thai road sign บ.20 — No bicycles. Meaning: Bicycles are not permitted to enter or travel on the road ahead. Learner-manual coverage: this identity is shown in the current DLT car-driver learner manual. Inclusion does not mean it appears in every theory test.
Thai name: ป้ายห้ามรถจักรยาน
Independent English reference · Source: Department of Highways · Sign บ.20
Road response
On the road
Driver action
What should you do?
Bicycles are not permitted to enter or travel on the road ahead. Riders must find an alternative route.
Exam-style scenario
Read the situation
A cyclist's planned route continues through an entrance marked with this prohibition.
Best response: Leave the prohibited route before its entrance and continue by a road open to bicycles.
Sign comparison
Don’t confuse it
This sign
No bicycles
Compare with
No tricycles, bicycles, or motorcycles
Key difference
The single bicycle pictogram prohibits bicycles only; the combined sign also excludes tricycles and motorcycles.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
