Single chevron left marker
A black-and-yellow chevron marker indicates a sharp change of alignment to the left. Follow the chevron direction and slow down.
Verified as Thai road sign ต.66 from Department of Rural Roads sign series on 2026-05-15.
Study guide
Connect this sign to practice
Single chevron left marker 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 Single chevron left marker 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.
