Temporary traffic-control sign
Use detour to the left
Thai road sign ตค.24 — Use detour to the left. Meaning: This rectangular orange direction sign is placed at a closure or decision point and directs traffic to use the detour to the left. Catalog status: additional official road-sign reference.
Thai name: ป้ายใช้ทางเบี่ยงซ้าย
Independent English reference · Source: Department of Highways · Sign ตค.24
Road response
On the road
Driver action
What should you do?
This rectangular orange direction sign is placed at a closure or decision point and directs traffic to use the detour to the left. Slow down and turn left along the marked temporary route.
Exam-style scenario
Read the situation
The through road is closed at the sign and the indicated detour begins to the left.
Best response: Leave the closed through road by taking the left-hand detour where this direction sign is placed.
Sign comparison
Don’t confuse it
This sign
Use detour to the left
Compare with
Use detour to the right
Key difference
This decision-point arrow directs traffic onto the left detour now; the mirrored sign starts the detour to the right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
