prohibition sign
No horn
Thai road sign บ.27 — No horn. Meaning: Drivers must not use the horn or make unnecessary noise in the area where this sign is posted. 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: ป้ายห้ามใช้เสียง
Independent English reference · Source: Department of Highways · Sign บ.27
Road response
On the road
Driver action
What should you do?
Drivers must not use the horn or make unnecessary noise in the area where this sign is posted.
Exam-style scenario
Read the situation
A pedestrian steps near the kerb in a signed quiet area, but there is no immediate collision risk.
Best response: Continue without sounding the horn because the pedestrian is not creating an immediate danger.
Sign comparison
Don’t confuse it
No close comparison recorded
No verified comparison sign is recorded for this entry. Compare the related signs below.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
