Temporary traffic-control sign
Work-zone detour to the left
Thai road sign ตก.5 — Work-zone detour to the left. Meaning: The road alignment diverts to the left around a closed or obstructed section in a work zone. 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: ป้ายเตือนทางเบี่ยงซ้าย
Independent English reference · Source: Department of Highways · Sign ตก.5
Road response
On the road
Driver action
What should you do?
Slow down and follow the temporary diversion path to the left before reaching the work area.
Exam-style scenario
Read the situation
The through route is diverted to a temporary path on the left before the closed works area.
Best response: Slow down and follow the temporary left-hand path before the closed works area.
Sign comparison
Don’t confuse it
This sign
Work-zone detour to the left
Compare with
Work-zone detour to the right
Key difference
The temporary path bends around the closure on the left; the mirrored detour warning routes traffic to the right.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
