Urban planning and zoning. They’re just planning in advance for urban sprawl and congestion. Mexico experienced a lot of growing pains (and preventable deaths) when its cities boomed and they haven’t forgotten.
Side rant: Where I used to live they zoned heavily for green areas for water absorption during rainy season and for sewage management bc it was low-lying tropical climate. Unfortunately, one big foreign hotel greasing palms and they’re building on top of a wildlife sanctuary necessary to prevent catastrophic flooding. Bye bye city buses full of people down the canal. But hey, ‘Mercia! Tourism! It brought me solace their fancy pool foundation shatters almost annually like clockwork and their pretty glass balconies kept popping from earth settling. Didn’t save the neighborhoods they destroyed by filling in a river delta though. Kept waiting for the “big one” earthquake that would bring that sucker down for good.