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Truck Rollover Warning: What It Means & What To Do

Truck Rollover Warning (W1-13) - diamond yellow with black warning sign: A sharp curve ahead where trucks and other high vehicles risk rolling over
MUTCD CodeW1-13
CategoryWarning Signs
ShapeDiamond
ColorYellow with black

What Does the Truck Rollover Warning Mean?

A sharp curve ahead where trucks and other high vehicles risk rolling over. Slow to the posted speed.

About This Sign

This warning sign marks a curve sharp enough that trucks and top-heavy vehicles can roll over if it is taken too fast. Reduce your speed to the advisory limit shown before you enter the curve.

Where you will see it

You see this sign before a sharp curve where trucks and other tall vehicles could roll over if they take it too fast, usually with a posted speed shown.

What to do

  • Slow to the advisory speed before you enter the curve.
  • If you drive a tall or heavy vehicle, take extra care.

A common mistake

Drivers of cars may think the warning is only for trucks. The curve is sharp for everyone, so follow the posted speed even if your vehicle feels stable.

What to remember for the test

Remember this sign warns of rollover risk for trucks and top-heavy vehicles on a sharp curve. The action is to reduce speed to the posted advisory speed.

Other Warning Signs

Frequently Asked Questions

What does the Truck Rollover Warning mean?

A sharp curve ahead where trucks and other high vehicles risk rolling over. Slow to the posted speed.

What shape and color is the Truck Rollover Warning?

The Truck Rollover Warning uses the Diamond shape and Yellow with black coloring.

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