Slippery When Wet Sign
The slippery when wet sign is a diamond-shaped yellow warning sign with a black symbol showing a car with wavy skid marks behind it. This sign alerts drivers that the road surface ahead becomes especially slippery when wet. While all roads become more slippery in rain, this sign is posted in areas where the surface is particularly prone to reduced traction — such as bridges, overpasses, shaded sections, areas with oil buildup, or road surfaces that don't drain well. The first few minutes of rain are often the most dangerous because water mixes with oil and dust on the road surface, creating an extremely slick film. When you see this sign, reduce your speed, increase your following distance, and avoid sudden braking, acceleration, or steering inputs. If your vehicle begins to skid, take your foot off the gas, don't slam the brakes, and steer in the direction you want to go. This sign is also relevant in winter when roads may be icy. Bridges and overpasses freeze before regular road surfaces because cold air circulates both above and below them.
Rules & What to Do
Slow down and increase following distance. Avoid sudden braking, sharp turns, or rapid acceleration. Maintain a steady speed. If you start to hydroplane, ease off the gas and steer straight until you regain traction. Stay in the tire tracks of the vehicle ahead.
Penalties
There's no penalty for the warning sign itself. However, driving too fast for conditions on a slippery road can result in a citation for driving at an unsafe speed, with fines of $100-$300+ and points on your record. If you cause an accident, you may be found liable.
For Commercial Drivers
Slippery roads are extremely dangerous for commercial vehicles. A loaded truck needs up to 25% more stopping distance on wet roads. Reduce speed by one-third on wet roads and by one-half or more on packed snow. Avoid using the engine brake (jake brake) on slippery surfaces as it can cause drive wheels to lock. For tanker drivers, liquid surge on slippery roads compounds the danger.
Frequently Asked Questions
What does the slippery when wet sign mean?
The slippery when wet sign warns that the road ahead has reduced traction when the surface is wet. Slow down, increase following distance, and avoid sudden moves.
What should you do on a slippery road?
Slow down gradually, increase your following distance to at least 6 seconds, avoid sudden braking or turning, and use gentle steering inputs. If you hydroplane, ease off the gas and steer straight.
Why do bridges freeze before roads?
Bridges freeze before regular roads because cold air circulates both above and below the bridge surface, causing it to lose heat faster. Regular roads retain warmth from the ground beneath them.