Winding Road Sign
A winding road sign is a diamond-shaped yellow warning sign with a black zigzag arrow symbol. It alerts drivers that the road ahead has a series of curves or turns alternating in direction. Unlike a single curve sign, the winding road sign indicates multiple successive curves — typically three or more — that require constant steering adjustments. You'll usually see this sign on mountain roads, along rivers, or in hilly terrain where the road follows the natural landscape. The sign is posted in advance to give you time to reduce speed before the first curve. When you see this sign, you should slow down to a safe speed before entering the curves, not while you're in them. Braking hard in a curve can cause you to lose control, especially in wet conditions. Keep both hands on the wheel, stay in your lane, and avoid passing other vehicles through the winding section. The sign may be accompanied by an advisory speed plate recommending a safe speed for the curves.
Rules & What to Do
Reduce speed before entering the winding section. Stay in your lane and avoid passing. Use a lower gear on steep, winding downgrades to help control speed. Watch for oncoming traffic that may drift into your lane on tight curves.
Penalties
While there's no penalty for ignoring the sign itself, driving too fast through curves can result in reckless driving or speed-related citations with fines of $150-$500 depending on the state, plus points on your record.
For Commercial Drivers
Winding roads are especially dangerous for large commercial vehicles due to their high center of gravity. Loaded trucks and buses are at significant risk of rollover on curves. Reduce speed well before the curves — a rollover can happen at speeds that feel safe in a car. Use engine braking and lower gears on downgrades. Watch your trailer tracking through tight curves, as trailers cut to the inside.
Frequently Asked Questions
What does a winding road sign mean?
A winding road sign warns that the road ahead has a series of curves alternating left and right. You should slow down before the curves begin and stay alert through the entire winding section.
What is the difference between a curve sign and a winding road sign?
A curve sign warns of a single curve or turn in the road, while a winding road sign indicates multiple successive curves. The winding road sign has a zigzag arrow showing three or more direction changes.
What shape is a winding road sign?
A winding road sign is diamond-shaped with a yellow background and a black zigzag arrow symbol. Like most warning signs in the US, it's a square rotated 45 degrees.