A tram or even regular trains would not have to be very fast for those distances and for faster trains we already have the technology to lean into curves - it‘s

A tram or even regular trains would not have to be very fast for those distances and for faster trains we already have the technology to lean into curves - it‘s quite common in Europe. And why not build a radial subway to get on to the opposing side of a circular city? (And why build this nonsense in a desert at all?)