the distance covered by the vehicle from the moment when the driver begins to actuate the control of the braking system until the moment when the vehicle stops
The trolley shall then be propelled in such a way that, at the moment of impact, its free running speed is 50 more or less 1 km/h and the manikin remains stable. The stopping distance of the trolley shall be 400 more or less 50 mm. The trolley shall remain horizontal throughout deceleration.