Sharp reverse curve ahead
The road ahead bends sharply in one direction and then immediately bends sharply in the opposite direction. Reduce speed before the curves and stay in your lane throughout. Foreigners should note that reverse curves can appear sooner than expected on Thai roads.
Verified as Thai road sign ต.7 from Thai Department of Land Transport sign series on 2026-05-15.
Study guide
Connect this sign to practice
Sharp reverse curve ahead sits in a cluster of warning signs that look uncomfortably similar. The Thai exam exploits that overlap. Reviewing it next to its visual neighbours in the question flow keeps the differences sharp on test day.
Now see it in questions.
Spotting Sharp reverse curve 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.
