warning sign
Left curve ahead
Thai road sign ต.1 — Left curve ahead. Meaning: The road ahead curves to the left. 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: ป้ายเตือนทางโค้ง
Independent English reference · Source: Department of Highways · Sign ต.1
Road response
On the road
Driver action
What should you do?
Reduce speed and keep control before entering the curve.
Exam-style scenario
Read the situation
The road disappears behind vegetation and this symbol shows that the next bend turns left.
Best response: Slow before the hidden bend and steer smoothly left while staying within the lane.
Sign comparison
Don’t confuse it
This sign
Left curve ahead
Compare with
Curve ahead
Key difference
The curve symbol bends left, identifying the direction of the next bend; the mirrored companion bends right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
