And China pretty much stopped running train at 350km/h. Steel-on-steel rail is realistically limited to top service speed of 320km/h, maybe 360 at most. The ma

And China pretty much stopped running train at 350km/h. Steel-on-steel rail is realistically limited to top service speed of 320km/h, maybe 360 at most. The maintenance is just too high when you increase speed beyond that. Newer Japanese Shinkansen line only operate at 260km/h, for example.