Shoulder work ahead
Work is taking place on the road shoulder ahead. Drivers should slow down, keep clear of workers and equipment, and be prepared for narrowed usable road space.
Verified as Thai road sign ตค.12 from Department of Highways sign series on 2026-05-15.
Study guide
Connect this sign to practice
Most candidates can describe Shoulder work ahead. The Thai exam tests whether you can pick it out of a roadside scene under time pressure and choose the right response. Practising it inside the question flow is what closes that gap.
Now see it in questions.
Spotting Shoulder work ahead in isolation is one thing. Recognising it inside a real exam-style question, among lookalikes and trick wording, is another. The diagnostic mixes it in for you.
