mandatory sign
Straight or right only
Thai road sign บ.47 — Straight or right only. Meaning: Drivers must continue straight or turn right at the junction ahead and must not turn left. 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: ป้ายให้ตรงไปหรือเลี้ยวขวา
Independent English reference · Source: Department of Highways · Sign บ.47
Road response
On the road
Driver action
What should you do?
Drivers must continue straight or turn right at the junction ahead and must not turn left.
Exam-style scenario
Read the situation
At the junction, your lane may continue ahead or turn right, but not take the left branch.
Best response: Go straight or turn right from this lane and leave the left branch for a permitted approach.
Sign comparison
Don’t confuse it
This sign
Straight or right only
Compare with
Straight or left only
Key difference
The branching arrows allow ahead or right but not left; the mirrored companion permits ahead or left.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
