I'm skeptical. A 2200km vacuum tube, a 1000kph capable train. Theres a lot of things to go wrong, and if something goes wrong people die. I don't doubt it's d

I'm skeptical. A 2200km vacuum tube, a 1000kph capable train. Theres a lot of things to go wrong, and if something goes wrong people die. I don't doubt it's doable, I don't think it's practical though. Has anyone done any research on sonic boom induced stress fractures on reinforced concrete vacuum tubes, or is that too niche?