A method for calculating the motion data of the head of a driver of a transportation vehicle wherein the driver is wearing a pair of data glasses. The data glasses are equipped with at least one glasses measurement unit which detects the movements of the head of the driver. The transportation vehicle is equipped with a transportation vehicle measurement unit which detects at least the accelerations of the transportation vehicle. The measured accelerations of the transportation vehicle are transferred wirelessly to the data glasses. The calculation of the head pose is carried out in a special processor unit of the data glasses which includes an implementation of a Kalman filter in which the motion data of the glasses measurement unit, corrected by the motion data of the transportation vehicle measurement unit, are merged with the motion data of an additional glasses measurement unit.