warning sign
Carriageway shifts right ahead
Thai road sign ต.43 — Carriageway shifts right ahead. Meaning: The driving lane shifts to the right ahead, often where the road realigns around an obstacle, bridge, or construction zone. 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: ป้ายเตือนเปลี่ยนช่องเดินรถ
Independent English reference · Source: Department of Highways · Sign ต.43
Road response
On the road
Driver action
What should you do?
Reduce speed and follow the lane markings as the carriageway shifts to the right; do not continue on the old alignment.
Exam-style scenario
Read the situation
The lane bends right around works and the faded former alignment appears to continue straight.
Best response: Track the marked lane to the right and ignore the faded alignment that appears to continue ahead.
Sign comparison
Don’t confuse it
This sign
Carriageway shifts right ahead
Compare with
Carriageway shifts left ahead
Key difference
Both lane edges shift right together rather than ending; the mirrored sign moves the live alignment to the left.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
