prohibition sign
Speed limit (80 km/h)
Thai road sign บ.32-80: Speed limit (80 km/h). Meaning: Drivers must not exceed 80 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.32-80
Road response
On the road
Driver action
What should you do?
Do not exceed 80 km/h after passing this sign unless a lower safe speed is needed.
Exam-style scenario
Read the situation
An 80 km/h sign appears after a junction, replacing the limit that applied before it.
Best response: Follow the newly posted 80 km/h maximum rather than relying on the limit from before the junction.
Sign comparison
Don’t confuse it
This sign
Speed limit (80 km/h)
Compare with
Speed limit (70 km/h)
Key difference
The two-loop numeral is 8, giving an 80 km/h maximum; the similar sign with an angled 7 means 70 km/h.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
