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Reverse Curve: What It Means & What To Do

Reverse Curve (W1-4) - diamond yellow with black warning sign: The road curves in one direction, then curves in the opposite direction
MUTCD CodeW1-4
CategoryWarning Signs
ShapeDiamond
ColorYellow with black

What Does the Reverse Curve Mean?

The road curves in one direction, then curves in the opposite direction.

About This Sign

Similar to a reverse turn but with gentler curves. Expect the road to change direction twice in succession.

Where you will see it

This yellow diamond warns of a road that curves one way and then curves the opposite way, with gentler curves than a reverse turn. It is posted before the first curve.

What to do

  • Reduce speed before the first curve.
  • Expect the road to change direction twice in a row.
  • Steer smoothly and keep to your lane through both curves.

A common mistake

Because the curves are gentle, drivers underestimate them and take the second curve too fast. Treat the whole stretch as one hazard.

What to remember for the test

Reverse Curve has two curves in opposite directions, gentler than a Reverse Turn. Both are warning signs, and the action is to slow down.

Commonly Confused With

Other Warning Signs

Frequently Asked Questions

What does the Reverse Curve mean?

The road curves in one direction, then curves in the opposite direction.

What shape and color is the Reverse Curve?

The Reverse Curve uses the Diamond shape and Yellow with black coloring.

Practice Road Sign Questions

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