Zipper merge ahead
Traffic streams merge alternately ahead. Adjust speed and merge in turn with vehicles from the adjacent lane.
Verified as Thai road sign ต.74 from Department of Rural Roads sign series on 2026-05-15.
Study guide
Connect this sign to practice
Zipper merge 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 Zipper merge 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.
