Merge Left Sign
Left lane ending, traffic must merge
What to do
Prepare to merge left safely.
Tips
Check mirrors and blind spots before merging.
Test yourself
You see this sign while driving. What do you have to do?
Show the answer
Prepare to merge left safely.
Common mistake
Waiting too long to merge
About warning signs
Warning signs are diamond-shaped and yellow with black symbols. They alert you to hazards ahead — curves, intersections, crossings — so you have time to slow down. On the DMV written test, expect several questions asking what a specific warning sign means and what action it calls for.
Practice questions about this sign
This merge-arrow sign means:
- A. The lane you are in is ending and traffic must merge left
- B. A new lane is opening on the left
- C. Left turns are prohibited ahead
- D. Two-way traffic begins ahead
Show answer
A. The lane you are in is ending and traffic must merge left — A merge-left sign warns that the current lane ends ahead, so drivers must safely merge into the lane to their left before it disappears.
Universal rule · checked against MUTCD 11th Edition, Part 2 — Signs (General) — Traffic Signs — General · verified 2026-08-01
Frequently asked questions
What does the Merge Left Sign mean?
Left lane ending, traffic must merge
What should you do at a Merge Left Sign?
Prepare to merge left safely.
Reference standard: Federal Highway Administration Manual on Uniform Traffic Control Devices ↗. State and local agencies may add rules or operating times, so follow the complete posted sign where you drive. How DMV Prep sources content.
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