the housing wall and the outer platform end 50 also the lateral set edges 26 prevent a lateral flowing away of the water rinsing down from the vehicles alternatively to the arrangement of the transport device shown in fig3 in accordance with fig9 and 10 a pole 60 can be provided for between the clamping connector 39 and the transmitter device therein the pole 60 prolongates the radius achieved by means of the transport device the length of the pole preferably amounting to between 1 and 2 m the transmitter device here shown in part only can be shifted to the outside further into the entry and exit boxes by the amount of the pole length the maximally extended position of the pole 60 therein is shown in dashed line the toothed belt 36 is guided in a toothed belt guide 52 for preventing jamming or lateral moving out of the toothed belt 36 fig1 shows a top view of the pole 60 on its one end the pole 60 is screwed to the cross carrier 18 and welded thereto on the other end of the pole 60 a clamping connector 39 is provided for which connects the pole 60 with the toothed belt 36 in fig1 a side view of the pole 60 and of a part of the pole guide 61 is shown the pole has a hollow square profile to which a guide sheet is welded to which two plastic plates are screwed the plastic plates of the pole guide 61 guarantee low friction sliding in the rails of the pole guide by means of the pole guide 61 the transmitter device can be accurately moved into the parking.