A pair of bridges as a building block for sustainable mobility development—across Innsbruck and the surrounding area by tram. The concept focuses on the construction of two new bridges as elements of Innsbruck's urban development, to realize a continuous tram network from Rum to Völs, spanning a federal highway roundabout and two banks of the Inn River. The supporting structure of the bridges is derived with minimal gestures from function, position, and the surrounding urban and topographical structure. The city does not end here, nor does it begin here; the bridges each mark transitions of an expanding urban body.