Adtranz low floor trams come in lengths of three or four modules, all of which are approximately the same length. Under each module lies a bogie; the low floor, however, constrains the bogie's movement. Two of the axles are electrified linked to the bogie truck by means of a universal joint. Characteristic of this tram is its ability to follow curves, which requires a special track layout. This occurs when the first or last module drives through an arc and drags the other two modules (which are on the straight) after it.