warning sign
Added lane ahead
Thai road sign ต.44 — Added lane ahead. Meaning: An extra lane is being added to the road 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.44
Road response
On the road
Driver action
What should you do?
Continue in the current lane while checking for traffic using the additional lane beside it.
Exam-style scenario
Read the situation
Your lane continues unchanged while another lane begins alongside it on the left.
Best response: Keep the current lane while checking the new lane on the left for vehicles travelling alongside.
Sign comparison
Don’t confuse it
This sign
Added lane ahead
Compare with
Added lane ahead from the right
Key difference
The diagram shows an additional lane developing alongside the carriageway; the companion explicitly shows that added lane arriving from the right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
