What is the zipper merge and when should you use it?
Quick Answer
The zipper merge means continuing in a closing lane until the merge point, then alternating with traffic in the open lane — one car at a time, like a zipper. Research shows it reduces backups by up to 40%. Do not merge early just because others are doing so — late merging is actually more efficient.
Explanation
The zipper merge means continuing in a closing lane until the merge point, then alternating with traffic in the open lane — one car at a time, like a zipper. Research shows it reduces backups by up to 40%. Do not merge early just because others are doing so — late merging is actually more efficient. Understanding this concept is essential for safe driving and will help you answer similar questions on the DMV written test.
Why This Matters on the DMV Test
Questions about Safe Driving are among the most common on the permit test. Knowing the correct answer helps you pass your exam and stay safe on the road. Most states require a score of 70–83% to pass.
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