Train left: TWINDEXX is a double-deck train that is specially designed by Bombardier Transportation for Swiss Federal Railways (SBB). The rolling stock was designed in response to SBB's proposals to launch an intercity high-speed express train. Train right: The RABe 501, nicknamed Giruno, is a high-speed electric multiple unit train built by Stadler Rail of Switzerland for the Swiss Federal Railways. According to Stadler Rail, it is the world's first single-decker low-floor high-speed train.