Incredible plans for âworldâs fastest trainâ FluxJet set to whizz passengers across country at 621mph INCREDIBLE plans have been unveiled to construct the world’s fastest train, capable of transporting passengers at an astounding speed of 621mph across a country. The ambitious ÂŁ14 billion high-speed floating train system is expected to connect two major cities before 2035. A Canadian startup, TransPod,…