Slippery When Wet
- Shape
- Diamond
- Color
- Black on yellow
- Meaning
- The road is slippery when wet.
- Required driver action
- Slow down in wet weather and avoid sudden braking or steering.
- CDL relevance
- Hydroplaning can start around 30 mph.
Source: FHWA — Manual on Uniform Traffic Control Devices (MUTCD) (11th Edition (December 2023)). Sign images are original simplified illustrations for study, not official MUTCD artwork.