Lane Ends Sign: What to Do When Your Lane Disappears
The lane ends sign is a yellow diamond showing two lanes, one of which bends into the other. It warns that the lane shown bending will end ahead. If you are in that lane, signal and merge into the continuing lane when there is a safe gap; if you are in the continuing lane, keep a steady speed and let merging drivers in.
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Lane ends quiz: 3 test-style questions
- A yellow diamond shows two lines; the right line angles in toward the left line. What does it mean? The right lane ends ahead; merge left / A new lane is added on the right / The road becomes a divided highway / Two-way traffic ahead. Answer: The right lane ends ahead; merge left. This is the lane ends (lane reduction) sign. The line that bends shows the lane that ends, here the right one.
- Your lane is ending and traffic is moving slowly. Which method keeps traffic flowing best? Stop at the end of your lane and wait for everyone to pass / Use both lanes until the merge point, then take turns (zipper merge) / Drive on the shoulder to get ahead / Merge immediately by forcing your way in. Answer: Use both lanes until the merge point, then take turns (zipper merge). In slow, heavy traffic the zipper merge, taking turns at the merge point, uses road space efficiently. Several states promote it with signs.
- You are in the lane that continues. A driver signals to merge in front of you. You should: Speed up so they merge behind you / Move onto the shoulder / Keep a steady speed or ease off to let them in / Honk to warn them. Answer: Keep a steady speed or ease off to let them in. Drivers in the ending lane must yield, but blocking them creates sudden braking and crashes. Easing off a little lets the merge happen smoothly.
What the lane ends sign means
The Lane Ends sign (MUTCD W4-2), also called the lane reduction transition sign, is a yellow diamond with two black lines. One line goes straight; the other bends and joins it. The bending line is the lane that is about to end. The sign is posted before the point where a multi-lane road loses a lane, so you have time to change lanes calmly.
The same message can be given in words with a rectangular yellow sign: RIGHT LANE ENDS or LANE ENDS MERGE LEFT. Pavement markings help too: the lane line between the two lanes often becomes a wider dotted line, and arrows painted in the ending lane point toward the lane that continues.
What to do, step by step
- Identify which lane ends from the symbol, the words or the pavement arrows.
- In the ending lane: signal, check your mirror and blind spot, adjust your speed to fit a gap and merge. You must yield to vehicles in the continuing lane.
- In heavy, slow traffic: use the zipper merge — stay in your lane to the merge point, then alternate with the other lane one car at a time.
- In the continuing lane: keep a steady speed, leave space, and let merging drivers in. Do not speed up or close the gap.
- Never use the shoulder to get past the merge point.
Common mistakes and test traps
Test questions often show the symbol and ask which lane ends. Remember: the line that bends is the one that ends. Do not confuse the sign with the merge sign, where traffic from another road joins yours, or with the Added Lane sign, where a new lane appears. Merging too early in heavy traffic is not wrong, but abrupt merging at the last second at high speed is. In light, fast traffic, merge as soon as there is a safe gap.
Where you see it
Lane ends signs appear where a four-lane highway narrows to two lanes, at the end of passing lanes on rural roads, after on-ramps that do not continue as a full lane, and in work zones, where an orange version warns of a lane closure.
Related signs
Compare it with the merge sign, the divided highway sign and the two-way traffic sign, often posted where a four-lane road ends. Then read our pavement markings guide.
Lane ends sign FAQ
Who has the right of way when a lane ends?
Vehicles in the lane that continues. Drivers in the ending lane must yield and merge when it is safe, but drivers in the through lane should cooperate and not block them.
How do I know which lane is ending?
On the symbol sign, the line that bends into the other is the lane that ends. Word signs such as RIGHT LANE ENDS and arrows painted on the pavement confirm it.
What is a zipper merge?
In slow, congested traffic, drivers use both lanes up to the merge point and then take turns entering the continuing lane, like the teeth of a zipper.
Is it rude to drive to the end of the ending lane?
Not in congestion, where the zipper merge is the recommended method. Using the shoulder or forcing your way in at the last second is unsafe and can be illegal.
Official sources
Keep studying
- Merge sign
- Divided highway sign
- Road work ahead sign
- Traffic lights and pavement markings
- All U.S. road signs
- Practice tests by topic