prohibition sign
Speed limit (90 km/h)
Thai road sign บ.32-90: Speed limit (90 km/h). Meaning: Drivers must not exceed 90 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.32-90
Road response
On the road
Driver action
What should you do?
Drivers must not exceed 90 km/h from this sign onward.
Exam-style scenario
Read the situation
You join a road displaying a 90 km/h limit while traffic ahead is moving faster.
Best response: Keep to 90 km/h or less and do not copy faster traffic ahead.
Sign comparison
Don’t confuse it
This sign
Speed limit (90 km/h)
Compare with
Speed limit (100 km/h)
Key difference
This two-digit sign limits speed to 90 km/h; the three-digit 100 sign sets a different maximum.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
