The term “hydroplaning” indicates the slipping of a vehicle on water on the road surfacing, due to rain or other reasons. A water “wedge” builds up before the tire that the grooves of the tire cannot “pump” sideways, and the tire suddenly loses traction. This phenomenon increases depending on the quantity of water on the road surfacing, the conditions of the tires and the vehicle’s speed. It is made worse by low tire pressure or the fact that the vehicle is empty. In case of rain, drive carefully at moderate speed, avoid sudden accelerations, decelerations and swerving. Water puddles can be particularly hazardous. Some road stretches may be “flooded”: driving at high speed means losing control of your vehicle. Reduced traction also requires greater breaking distance, 20 to 80 percent more depending on the conditions of the road. In case of emergency braking and tire lock on a wet road, there are two serious risks: a longer braking distance to bring your vehicle to a stop, and the loss of control as the steering does not respond. Both result from lack of traction and can be overcome to some extent with ABS, but there are limits