I'm really curious about turns and switches. The latter more about loading and unloading. If you have a platform to carry 300 people / hr to or from the other city how do you load them and keep them organized.

The failure scenarios are interesting too. Lets say a tube breaks, if the linear motors are spaced out, how do they brake? Turn off the air lift? Does that then destroy the tube they are in? What is the emergency exit like?