warning sign
Left obstruction marker
Thai road sign ต.72 — Left obstruction marker. Meaning: A black-and-yellow obstruction marker identifies a roadside or carriageway obstruction. Catalog status: additional official road-sign reference.
Thai name: ป้ายเตือนสิ่งกีดขวาง
Independent English reference · Source: Department of Highways · Sign ต.72
Road response
On the road
Driver action
What should you do?
Keep clear of the marked hazard.
Exam-style scenario
Read the situation
The diagonal marker on an obstruction directs traffic to pass on its left side.
Best response: Follow the diagonal marker to the left of the obstruction and keep a safe clearance from it.
Sign comparison
Don’t confuse it
This sign
Left obstruction marker
Compare with
Obstruction marker — pass on right
Key difference
Its diagonal treatment directs traffic to the obstruction's left; the mirrored marker directs traffic to the right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
