Washington State Department of Licensing Knowledge Test

Which action helps prevent hydroplaning during rainy conditions?

1. Avoiding sudden maneuvers

2. Driving faster than normal

3. Using cruise control

4. Braking hard

The correct answer is: Avoiding sudden maneuvers

Avoiding sudden maneuvers is a key action in preventing hydroplaning during rainy conditions because such maneuvers can lead to a loss of traction on wet surfaces. When a vehicle suddenly swerves, accelerates, or brakes sharply on a wet road, it can disrupt the tire’s ability to effectively channel water away from the tread. This increases the risk of the tires losing contact with the road, resulting in hydroplaning, where the vehicle rides on a layer of water instead of the road surface. Instead, smooth and gradual adjustments to steering, speed, and braking help maintain better control and traction, minimizing the chances of hydroplaning. In contrast, driving faster than normal can exacerbate hydroplaning risks, as higher speeds reduce the tires’ ability to displace water. Using cruise control is discouraged in rain because it can lead to an automatic response that might be too abrupt for changing conditions, and braking hard can also cause a loss of control. Maintaining steady and moderate speed along with smooth driving practices is essential for safety in wet conditions.