prohibition sign
No tricycles, bicycles, or motorcycles
Thai road sign บ.25 — No tricycles, bicycles, or motorcycles. Meaning: Tricycles, bicycles, and motorcycles are prohibited from entering or travelling 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 รถสามล้อ และรถจักรยานยนต์
Independent English reference · Source: Department of Highways · Sign บ.25
Road response
On the road
Driver action
What should you do?
Tricycles, bicycles, and motorcycles are prohibited from entering or travelling on the road ahead.
Exam-style scenario
Read the situation
A motorcycle rider reaches an entrance whose sign excludes three separate lightweight vehicle classes.
Best response: Do not enter on the motorcycle; the restriction covers it as well as bicycles and tricycles.
Sign comparison
Don’t confuse it
This sign
No tricycles, bicycles, or motorcycles
Compare with
No bicycles
Key difference
Three pictograms create a combined ban on tricycles, bicycles, and motorcycles; the bicycle-only sign covers one class.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
