One way sign
An arrow sign reading ONE WAY. Traffic on that street or road may travel only in the direction of the arrow.
How to read it
The MUTCD uses it on streets and roads where vehicles may travel in one direction only, and places it parallel to the one-way street at every alley and road that meets it. Michigan's manual describes a one-way street as one where traffic flows the same direction in all lanes.
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
More road signs
The same shape elsewhere
Browse symbols drawn with arrows or letters and numbers.
Sources
- MUTCD 2009 Edition, Chapter 2B: Regulatory Signs, Barricades, and Gates, MUTCD 2009, Part 2, U.S. Federal Highway Administration, Section 2B.40
- Pennsylvania Driver's Manual, Chapter 2: Signals, Signs and Pavement Markings, Pennsylvania Department of Transportation, p. 11
- Official Florida Driver License Handbook, rev. 08/2023, Florida Department of Highway Safety and Motor Vehicles, p. 49
- What Every Driver Must Know, Michigan driver manual, Michigan Department of State, Chapter 5, sign 5
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 25, 2026. How we research
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