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Slower Traffic Keep Right: What It Means & What To Do

Slower Traffic Keep Right (R4-3) - rectangle (vertical) white with black/red regulatory sign: Vehicles traveling slower than the normal speed of traffic should use the right lane
MUTCD CodeR4-3
CategoryRegulatory Signs
ShapeRectangle (vertical)
ColorWhite with black/red

What Does the Slower Traffic Keep Right Mean?

Vehicles traveling slower than the normal speed of traffic should use the right lane.

About This Sign

This sign reminds slower-moving vehicles to move to the right lane, allowing faster traffic to pass on the left.

Other Regulatory Signs

Stop Sign (R1-1) - octagon red with white regulatory sign: Come to a complete stop before the stop line or crosswalk

Stop Sign

R1-1

Yield Sign (R1-2) - triangle (inverted) red and white regulatory sign: Slow down and be prepared to stop

Yield Sign

R1-2

Stop for Pedestrians in Crosswalk (R1-5b) - rectangle (vertical) white with black/red regulatory sign: Stop for pedestrians within the crosswalk

Stop for Pedestrians in Crosswalk

R1-5b

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Slower Traffic Keep Right - DMV Road Sign Meaning & Test Guide | DMV IQ