warning sign
Side road merging from left ahead
Thai road sign ต.46 — Side road merging from left ahead. Meaning: A side road joins your road 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: ป้ายเตือนทางร่วม
Independent English reference · Source: Department of Highways · Sign ต.46
Road response
On the road
Driver action
What should you do?
Check the left-side entry and adjust speed or spacing for vehicles merging into the traffic stream.
Exam-style scenario
Read the situation
Vehicles accelerate from a left-side road and merge into your stream ahead.
Best response: Check the left entry, create safe spacing, and adjust speed for vehicles merging into your stream.
Sign comparison
Don’t confuse it
This sign
Side road merging from left ahead
Compare with
Side road merging from right ahead
Key difference
The joining line feeds traffic from the left into the through stream; the mirrored sign shows the merge from the right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
