At what speed does hydroplaning typically start to occur?

Answer: B — 30 mph

Hydroplaning typically begins to occur at speeds around 30 mph when a vehicle's tires lose contact with the road surface due to a film of water. This phenomenon happens when water accumulates on the roadway and the tires cannot effectively push the water away, which causes the vehicle to glide over the surface rather than maintaining traction. At speeds beyond this threshold, the risk of losing control increases significantly, as the water layer can lead to a complete loss of steering and braking control. It’s essential for drivers to be aware of this speed limit and adjust their driving accordingly in wet conditions, maintaining a safe distance from other vehicles and reducing speed to maintain traction and control. Options indicating lower or higher speeds do not accurately represent the typical onset of hydroplaning and could mislead drivers about the critical speed at which they need to be cautious on wet roads.