What causes aquaplaning?

Aquaplaning occurs primarily due to a build-up of water between the tyres and the road surface, which prevents the tyres from maintaining direct contact with the road. When a vehicle is travelling over a wet road, especially if the water depth is significant, the tyres can begin to hydroplane, leading to a loss of traction. This phenomenon happens when the water cannot be displaced quickly enough by the tyre tread, causing the vehicle to skim over the surface of the water rather than grip the road. It is crucial for drivers to be aware of this risk, as it can occur at various speeds, depending on the depth of the water and the tread design of the tyres.

While factors such as insufficient tread, excessive speed, and improper tyre pressure can contribute to the likelihood of aquaplaning or worsen the situation, the immediate cause is the water build-up that leads to a loss of contact with the road surface.