The test is performed on a circular test track with a diameter of 100 m paved with asphalt and a trough with water depth controlled in the range 4-10 mm. The test vehicle is equipped with a GPS-based device and an accelerometer box. While driving through the water trough the travelling speed and the minimum lateral acceleration are recorded. The car is driven 3 times at a 60 km/h (speed to be changed based on tire size) and constant steering angle into the water trough. Then the entrance speed is increased by 5 km/h step while the test is stopped when the minimum lateral acceleration goes to zero and the test vehicle is not anymore able to keep a circular trajectory. The test starts with the control tire set to be re-tested at the end of the session in order to keep into consideration possible changes of the test conditions. The average lateral acceleration of each tire set contributes to the overall result calculation.
