warning sign
Reverse curve ahead, first to the right
Thai road sign ต.6 — Reverse curve ahead, first to the right. Meaning: The road ahead curves in one direction and then the other, beginning with a curve to the right. 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: ป้ายเตือนทางโค้งกลับ
Independent English reference · Source: Department of Highways · Sign ต.6
Road response
On the road
Driver action
What should you do?
Reduce speed before the first curve.
Exam-style scenario
Read the situation
The first of two successive bends turns right and the second returns left.
Best response: Reduce speed for the first right bend and be ready for the following return to the left.
Sign comparison
Don’t confuse it
This sign
Reverse curve ahead, first to the right
Compare with
Reverse curve ahead
Key difference
The first sweep goes right before returning left; the mirrored reverse-curve sign begins to the left.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
