[Clewza313]

Putrajaya in Malaysia (est 2001) is an interesting comparison. It's also overly ambitious and oversized, but it's not quite as nuts (the empty highways are 3-4 lanes, not 10), it has a comparatively far more sane location (between Kuala Lumpur and its main airport), and its actual population is around 90,000.

https://en.wikipedia.org/wiki/Putrajaya

[clydethefrog]

And of course Astana - or now called Nur-Sultan to honour the Kazakh president. Also has the similar highways that can just be used for airplanes if needed. The city was a ghost town in the weekends when I visited 6 years ago, because all government personnel takes the night train to Almaty in the weekends.