prohibition sign
Speed limit (45 km/h)
Thai road sign บ.32-45 — Speed limit (45 km/h). Meaning: You must not drive faster than 45 km/h from this sign onward. Catalog status: additional official road-sign reference.
Thai name: ป้ายจำกัดความเร็ว
Independent English reference · Source: Department of Highways · Sign บ.32-45
Road response
On the road
Driver action
What should you do?
You must not drive faster than 45 km/h from this sign onward.
Exam-style scenario
Read the situation
You are travelling at 50 km/h when an unusual 45 km/h limit begins.
Best response: Ease below 45 km/h as the unusual posted limit takes effect.
Sign comparison
Don’t confuse it
This sign
Speed limit (45 km/h)
Compare with
Speed limit (40 km/h)
Key difference
The additional 5 makes this a 45 km/h maximum; the nearby-looking 40 sign sets a lower limit.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
