warning sign
Sharp left curve ahead
Thai road sign ต.3 — Sharp left curve ahead. Meaning: The road ahead has a sharp curve 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: ป้ายเตือนทางโค้งรัศมีแคบ
Independent English reference · Source: Department of Highways · Sign ต.3
Road response
On the road
Driver action
What should you do?
Slow down more than for an ordinary curve and prepare to steer carefully.
Exam-style scenario
Read the situation
A tight left bend follows a fast straight, and this sharper-curve symbol appears in advance.
Best response: Brake on the straight, enter the tight left bend slowly, and keep within the lane.
Sign comparison
Don’t confuse it
This sign
Sharp left curve ahead
Compare with
Sharp curve ahead
Key difference
The angular symbol shows a sharp left bend; the matching angular symbol facing the other way warns of a sharp right bend.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
