The video shows a high speed rail train in France being clocked at a stunning 356 mph. The US still has no HSR, mostly due to the staggering cost of building such a network across our 3,000 mile wide country. HSR cannot be run on existing tracks, new ones must be built, and they can’t haul freight. This makes it harder from HSR to be financially viable. Plus, in urban areas, their high speed requires that dedicated overpasses or tunnels be built for them as a crash between a car crossing a track and getting hit by a train doing 300 mph would be catastrophic.