Temporary traffic-control sign
Work-zone direction marker — left
Thai road sign ตก.25 — Work-zone direction marker — left. Meaning: The traffic alignment changes sharply to the left at this point. Learner-manual coverage: this identity is shown in the current DLT car-driver learner manual. Inclusion does not mean it appears in every theory test.
Thai name: ป้ายเตือนแนวทางไปทางซ้าย
Independent English reference · Source: Department of Highways · Sign ตก.25
Road response
On the road
Driver action
What should you do?
The traffic alignment changes sharply to the left at this point. Reduce speed before the signed condition and keep enough space to respond safely.
Exam-style scenario
Read the situation
A temporary marker at a barrier shows that the open path runs to its left.
Best response: Pass the barrier on its left as directed by the marker and stay within the temporary path.
Sign comparison
Don’t confuse it
This sign
Work-zone direction marker — left
Compare with
Work-zone direction marker — right
Key difference
The temporary marker points to the open path on the left of the barrier; the mirrored marker sends traffic right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
