Abstract
If the road surface is wet a vehicle does not always react immediately to the driver's action as braking and steering because between tyre and surface there is a film of water. If this water cannot be expelled fast enough, the direct contact between tyre and surface is lost with the consequence that the vehicle is gliding over the film of water as it were. This phenomenon called hydroplaning. The article gives a survey of the factors playing a role in hydroplaning and the measures that can be taken to prevent it.