warning sign
Added lane ahead from the right
Thai road sign ต.45 — Added lane ahead from the right. Meaning: A traffic lane joins from the right 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: ป้ายเตือนทางขนาน
Independent English reference · Source: Department of Highways · Sign ต.45
Road response
On the road
Driver action
What should you do?
Stay alert for vehicles entering the main carriageway.
Exam-style scenario
Read the situation
A new lane joins the carriageway from the right without ending your current lane.
Best response: Continue in the through lane and check for vehicles using the additional lane that joins on the right.
Sign comparison
Don’t confuse it
This sign
Added lane ahead from the right
Compare with
Added lane ahead
Key difference
The extra lane enters from the right side of the diagram; the general added-lane sign does not specify that right-side origin.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
