In 2007, the Planning Office ordered 12 Variobahn trams from Stadler Rail, with an additional four on option. The first tram arrived on 7 December 2009, and was used for testing in the months leading up to the opening. Before the opening, three more trams were in place. The trams are long and wide, weighing . They have five articulated sections, and are expandable with another two modules to a length of , should higher capacity be necessary. All stations are built for extended trams.