Curve sign
A yellow diamond with a curved arrow. It warns of a curve in the road ahead, bending the way the arrow bends.
How to read it
It is the MUTCD's standard warning ahead of a curve. For sharper bends, those with an advisory speed of 30 mph or less, the Turn sign is used instead. An advisory speed plaque may be added below any diamond-shaped warning sign, giving the highest speed recommended for the curve.
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.
Read next
- Next in Road signsTurn signA yellow diamond with an arrow bent at a right angle. It warns of a sharp turn in the road 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 arrows, curves and waves or diamonds.
Sources
- MUTCD 2009 Edition, Chapter 2C: Warning Signs and Object Markers, MUTCD 2009, Part 2, U.S. Federal Highway Administration, Section 2C.07
- Pennsylvania Driver's Manual, Chapter 2: Signals, Signs and Pavement Markings, Pennsylvania Department of Transportation, p. 13
- 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
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