The megacity also had some of the world’s slowest traffic, at 31 minutes and 53 seconds per 10 kilometers. Globally, New York City’s center ranked 25th for slowest travel speed. But the city ...

Saudi Arabia is building a futuristic mega-city 33 times the size of New York City from scratch. Saudi officials describe it as "the world's most ambitious project." It's called Neom, a planned 16 ...