High Quality Content by WIKIPEDIA articles! The X'Trapolis train is an electric passenger train, designed by the transport technology company Alstom. The trains have high floors, and are available in both single- and double-deck models. The X'Trapolis 100 is a single deck electric passenger train, one of Alstom's X'Trapolis family of trains, used in Melbourne, Australia and Valparaiso, Chile. Propulsion for the train is provided by a separate locomotive, or from individual motors in self-propelled multiple units.