When there is water on the roadway, you must reduce your speed below 35 mph to avoid

Explanation

On a wet road, at speeds of up to 35 mph, modern tires will usually channel water away to maintain contact with the road. However, in deep water at higher speeds, the channeling action of the tires becomes less effective and the tires start to ride on a layer of water like water skis. This is called "hydroplaning." At 50 mph or above, hydroplaning may result in a total loss of braking and steering control. To prevent hydroplaning, slow down.