Curve Ahead Sign — Meaning

By DMV Master Editorial Team Updated April 28, 2026 Also: Curve, Right Curve, Left Curve

Category: Warning
Shape: Diamond
Colors: Yellow, Black
Text: (curved arrow)
MUTCD Code: W1-2

What does the Curve Ahead Sign mean?

The Curve Ahead sign is a yellow diamond with a black curved arrow indicating the direction of an upcoming curve. It warns drivers to slow down to navigate the curve safely. May be paired with an advisory speed plaque (e.g., "35 MPH") below.

What to do when you see this sign

1
Reduce speed before entering the curve
2
If an advisory speed is posted, do not exceed it
3
Stay in your lane; do not cross the centerline
4
Avoid braking IN the curve — slow down BEFORE entering

Where you'll see it

On rural two-lane roads
Mountain or hill country routes
Where road geometry changes after a long straight
Approaching reverse curves and S-curves

Test trap: don't get caught by this

The advisory speed below a curve sign is a recommendation for ideal conditions, not a legal speed limit. In rain, snow, or at night, reduce further. Failing to negotiate the curve at the advisory speed is your fault.

Practice questions about the Curve Ahead Sign

Test your knowledge with real DMV-style questions, each with the correct answer and explanation.

What does a SHARP CURVE sign indicate?

View answer & explanation

What does a SHARP CURVE sign indicate?

View answer & explanation

What does a SHARP CURVE sign indicate?

View answer & explanation

What does a CURVE AHEAD warning sign indicate?

View answer & explanation

What does a DOUBLE CURVE sign indicate?

View answer & explanation

States that test this sign

The Curve Ahead Sign appears in DMV practice tests for 50 states. Click any state to see its full DMV practice page.

Frequently asked questions

What is the difference between a Curve and a Sharp Turn sign?

A Curve sign indicates a gradual bend (typically more than 90 degrees of arc). A Sharp Turn sign (a 90-degree arrow) indicates an abrupt 90-degree turn requiring much greater speed reduction.

Should I brake during the curve?

No — slow down BEFORE the curve. Braking while turning can cause loss of traction. Steady throttle through the curve is safest.

Why does the advisory speed differ from the posted speed limit?

The advisory is calculated for the curve's geometry — the speed at which a typical vehicle can safely navigate without skidding. The posted limit is for the road overall.