A slight change of direction or a gust of wind could throw your car into a skid. Slippery Roads Slow down at the first sign of rain on the road. This is when many roads are the most slippery because oil and dust have not been washed away. If the road is slippery, it will not give your tires the grip they need. You must drive more slowly than you would on a dry road.
Some road surfaces are more slippery than others when wet.
These roads usually have warning signs. On cold, wet days, shade from trees or buildings can hide spots of ice. These areas freeze first and dry out last. Bridges and overpasses can also hide spots of ice. They tend to freeze before the rest of the road does.