mandatory sign
Keep right
Thai road sign บ.41 — Keep right. Meaning: Drivers must pass to the right of the sign or obstruction. 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: ป้ายให้ชิดขวา
Independent English reference · Source: Department of Highways · Sign บ.41
Road response
On the road
Driver action
What should you do?
Drivers must pass to the right of the sign or obstruction.
Exam-style scenario
Read the situation
Roadworks block the left side and this mandatory sign stands immediately before the obstruction.
Best response: Pass the roadworks on the right-hand side indicated by the mandatory arrow.
Sign comparison
Don’t confuse it
This sign
Keep right
Compare with
Keep left
Key difference
The arrow slopes down-right and requires passing on the obstruction's right; the mirrored sign requires the left side.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
