By using the patented, optionally available steering system, it is possible to change from longitudinal to transverse travel without stopping. This reduces the time needed to change the wheels and offers optimum manoeuvrability. A further advantage is the significantly reduced wear of the wheels. As the change of direction takes place during travel, the wheels no longer rotate on the spot, which significantly reduces wheel wear and increases the service life of the wheels. Typical areas of application for the new steering system are applications with a particularly high number of changes of direction in freely movable warehouses, when loading and unloading trucks or in block storage.