prohibition sign
No left turn
Thai road sign บ.8 — No left turn. Meaning: Turning left is prohibited at this intersection or for the road segment that follows. 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: ป้ายห้ามเลี้ยวซ้าย
Independent English reference · Source: Department of Highways · Sign บ.8
Road response
On the road
Driver action
What should you do?
Turning left is prohibited at this intersection or for the road segment that follows. The driver must continue straight or take a permitted alternative direction.
Exam-style scenario
Read the situation
Your destination is on the side street to the left, and this sign is posted at its junction.
Best response: Pass the left side road without turning and use a permitted route to reach the destination.
Sign comparison
Don’t confuse it
This sign
No left turn
Compare with
No right turn
Key difference
Its crossed arrow points left and bans a left turn; the matching sign with a right-pointing arrow bans the opposite turn.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
