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Minimum Speed: What It Means & What To Do

Minimum Speed (R2-4P) - rectangle (vertical) white with black/red regulatory sign: You must travel at least the posted minimum speed unless conditions make it unsafe
MUTCD CodeR2-4P
CategoryRegulatory Signs
ShapeRectangle (vertical)
ColorWhite with black/red

What Does the Minimum Speed Mean?

You must travel at least the posted minimum speed unless conditions make it unsafe.

About This Sign

Minimum speed signs are posted on highways where slow-moving traffic could create a hazard. Vehicles unable to maintain the minimum speed should not use the road.

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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Minimum Speed - DMV Road Sign Meaning & Test Guide | DMV IQ