Temporary traffic-control sign
Detour to the right ahead
Thai road sign ตค.9: Detour to the right ahead. Meaning: This rectangular orange advance sign warns that the designated temporary detour ahead turns to the right. Catalog status: additional official road-sign reference.
Thai name: ป้ายทางเบี่ยงขวา
Independent English reference · Source: Department of Highways · Sign ตค.9
Road response
On the road
Driver action
What should you do?
Reduce speed, watch for work-zone traffic control, and prepare to follow the right detour.
Exam-style scenario
Read the situation
The route will detour right after this advance notice rather than at the sign itself.
Best response: Reduce speed and prepare for the right detour while continuing to its actual signed turn.
Sign comparison
Don’t confuse it
This sign
Detour to the right ahead
Compare with
Detour to the left ahead
Key difference
This advance text notice says the later detour will be right; the matching notice announces a left detour.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
