The ICx was developed by Bombardier and Siemens for Deutsche Bahn as successor to the ICE1 and IC trains, whereby Bombardier was responsible for the exterior design. A considerably improved aerodynamic form characterises the new exterior design of the 250 km/h train and imparts a high degree of formal aesthetic design quality. At the same time it displays typical design features of its predecessors and thus integrates harmoniously in the existing vehicle family of the DB long-distance rail vehicles.