Curve sign

What to do

Reduce speed before entering the curve and stay in your lane.

Slow down before entering the curve and keep well inside your lane, especially at night or on wet pavement.

Image shows W1-2R.

Where it's used

Section 2C.07 makes the Curve (W1-2) sign the standard advance warning for a change in horizontal alignment, used when Table 2C-4 says a sign is needed based on road type, traffic volume and the gap between the curve's advisory speed and the speed limit. It is a black-on-yellow diamond with a curved arrow pointing left or right. It is often combined with an Advisory Speed plaque, and on sharper curves Chevron signs or delineators are added along the curve.

Don't confuse it with

• Turn: The Turn sign's sharply bent arrow is used for bends with an advisory speed of 30 mph or less, while the Curve sign's gentle arrow is for faster curves.
• Reverse Curve: Reverse Curve warns of two curves in opposite directions close together, not a single curve.
• Winding Road: Winding Road warns of three or more curves in a row, while the Curve sign warns of one.