prohibition sign
Speed limit (50 km/h)
Thai road sign บ.32-50 — Speed limit (50 km/h). Meaning: Drivers must not exceed 50 km/h from this sign onward. 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: ป้ายจำกัดความเร็ว
Independent English reference · Source: Department of Highways · Sign บ.32-50
Road response
On the road
Driver action
What should you do?
Reduce speed to 50 km/h or less from the point where this limit begins.
Exam-style scenario
Read the situation
A 50 km/h sign starts a new controlled section while your speedometer shows 62 km/h.
Best response: Reduce from 62 km/h and continue through the controlled section at no more than 50 km/h.
Sign comparison
Don’t confuse it
This sign
Speed limit (50 km/h)
Compare with
Speed limit (60 km/h)
Key difference
Its numeral is 50, so the maximum is 10 km/h lower than the otherwise identical 60 sign.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
