Next you're going to say that a sky bridge 300m above the ground with a shin high guard rail is impractical.
> A transport system running the length of the megastructure would be designed to connect both ends of the city within 20 minutes.
It would take a 500 km/h train to cover 170 km in 20 minutes. I think only maglevs [1] approach that speed.
[1]: https://en.wikipedia.org/wiki/Maglev
