Temporary traffic-control sign
Road work ahead
Thai road sign ตค.1 — Road work ahead. Meaning: Construction or maintenance work is ahead. Catalog status: additional official road-sign reference.
Thai name: ป้ายเตือนทางก่อสร้าง
Independent English reference · Source: Department of Highways · Sign ตค.1
Road response
On the road
Driver action
What should you do?
The driver should slow down and be prepared to obey any temporary signs, signals, or flagger directions in the work zone.
Exam-style scenario
Read the situation
A text-based temporary sign announces road work before workers, machinery, or lane controls become visible.
Best response: Slow at the text warning and be ready to follow the temporary controls that appear before the work area.
Sign comparison
Don’t confuse it
This sign
Road work ahead
Compare with
Construction ahead
Key difference
Road work uses a text message to announce the temporary hazard; Construction ahead uses a pictorial orange warning.
Put sign knowledge into practice.
Answer exam-style questions about road signs, traffic lights, and lane markings in clear English.
