Temporary traffic-control sign
Two right lanes merge left
Thai road sign ตก.24 — Two right lanes merge left. Meaning: Two right-side lanes merge into the through lane on their 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: ป้ายเตือนเบี่ยงเบนการจราจร
Independent English reference · Source: Department of Highways · Sign ตก.24
Road response
On the road
Driver action
What should you do?
Two right-side lanes merge into the through lane on their left.
Exam-style scenario
Read the situation
Two lanes on the right disappear, compressing their traffic toward the single continuing lane on the left.
Best response: Begin the required merges early enough for both closing right lanes to join the single continuing left lane safely.
Sign comparison
Don’t confuse it
This sign
Two right lanes merge left
Compare with
Right lane merges left
Key difference
Two separate right-side lanes disappear into one continuing left lane; the simpler merge sign shows only one right lane ending.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
