warning sign
Side road ahead on the left
Thai road sign ต.13 — Side road ahead on the left. Meaning: A side road joins from the left ahead. 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: ป้ายเตือนทางแยกรูปแบบต่าง ๆ
Independent English reference · Source: Department of Highways · Sign ต.13
Road response
On the road
Driver action
What should you do?
Slow down and be alert for vehicles entering or leaving the main road.
Exam-style scenario
Read the situation
A side road joins from the left beyond a wall that hides approaching vehicles.
Best response: Slow before the concealed left junction and watch for vehicles entering or turning across the main road.
Sign comparison
Don’t confuse it
This sign
Side road ahead on the left
Compare with
Side road ahead
Key difference
The short branch enters from the left side of the main line; the mirrored side-road sign places the branch on the right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
