warning sign
Obstruction marker — pass on right
Thai road sign ต.73 — Obstruction marker — pass on right. Meaning: Marks an obstruction that traffic must pass only on the right. 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: ป้ายเตือนสิ่งกีดขวาง
Independent English reference · Source: Department of Highways · Sign ต.73
Road response
On the road
Driver action
What should you do?
Marks an obstruction that traffic must pass only on the right.
Exam-style scenario
Read the situation
A barrier occupies the left portion of the lane and its marker directs traffic to the right.
Best response: Move through the open path on the right and keep clear of the barrier occupying the left side.
Sign comparison
Don’t confuse it
This sign
Obstruction marker — pass on right
Compare with
Left obstruction marker
Key difference
Its diagonal treatment directs traffic to the obstruction's right; the mirrored marker directs traffic to the left.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
