Warning signs
Merge sign
Traffic from another lane or ramp is joining your road from the right. Adjust speed to let it merge.
What it looks like
Yellow diamond with a straight black arrow and a curved black line that joins it from the lower right.
- Type
- Warning
- Federal design code
- MUTCD W4-1R
From real handbooks
How permit tests ask about it
28 of our verified questions in 28 states show this sign. A few of them, each from a different handbook where we can:
1.You are on the expressway and see this sign just before an entrance ramp. What should you do?
- ASpeed up to block the ramp driver
- BStop and wait for the ramp to clear
- CHonk to warn the ramp driver
- DSlow down to let the ramp driver merge
Show the answer
✓ D. Slow down to let the ramp driver merge
A merging lanes sign means two lanes will become one. Near ramps, the expressway driver should slow down to let the ramp driver merge.
2.What does this sign mean?
- ATraffic is merging; move over when safe
- BYou must stop for cross traffic
- CA road ends just ahead of you
- DTwo-way traffic is ahead of you
Show the answer
✓ A. Traffic is merging; move over when safe
A merge sign shows a lane merging from the right or left; move over to the next lane when it is safe.
Source: Wisconsin Motorists' Handbook (BDS126) (2026), page 27
3.What does this sign mean for you on the main road?
- AYou must take the next exit
- BCars may merge in; let them enter
- CYour own lane is ending ahead
- DYou must stop for merging cars
Show the answer
✓ B. Cars may merge in; let them enter
A merging traffic sign warns that vehicles will merge onto your road; be prepared to allow them to enter.