Merge sign
A yellow diamond with a curved line joining a straight one. It warns that traffic from another road or ramp may merge into the lane ahead.
Easily confused with
How to read it
The MUTCD uses it on the major road ahead of a point where lanes from two roadways come together as a single lane. Pennsylvania's manual adds that entering traffic yields to traffic already on the major road.
Rules vary by state and country. This explains the sign's standard meaning in the U.S. Manual on Uniform Traffic Control Devices; it isn't legal advice.
Merge or added lane
Where the entering road brings a new lane with it and no merging is needed, the Added Lane sign is used instead.
Read next
- Next in Road signsLane ends signA yellow diamond with two lines, one bending in to meet the other. It warns that one lane of a multi-lane road ends ahead.
- The same shape in Army ranksFirst sergeant (E-8)Three chevrons above three arcs with a diamond between them are the insignia of a first sergeant (1SG), pay grade E-8 in the US Army and the senior NCO of a company.
More road signs
The same shape elsewhere
Browse symbols drawn with curves and waves, diamonds or lines.
Sources
- MUTCD 2009 Edition, Chapter 2C: Warning Signs and Object Markers, MUTCD 2009, Part 2, U.S. Federal Highway Administration, Section 2C.40
- Pennsylvania Driver's Manual, Chapter 2: Signals, Signs and Pavement Markings, Pennsylvania Department of Transportation, p. 14
- Official Florida Driver License Handbook, rev. 08/2023, Florida Department of Highway Safety and Motor Vehicles, p. 50
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 25, 2026. How we research
Added .