This invention’s principle item is the Harte (passive point) and the interaction with it through the three independent scanning devices which are used for changing tracks as well. In order to change direction to the left or right or to go straight ahead there are three different scanning devices which can be lowered or raised (1, 2, 7). Today’s wagons as well as this invention’s vehicles go over the Harte (passive point) (Fig. 1) straight ahead because of their wheel constructions resp. their active normal scanning device (1) without being influenced by the existence of the passive point.