It’s like large hospitals.
Usually if you try to get around large hospitals, you have to navigate a maze of hallways. There’s no direct route anywhere. And it sure seems to be designed poorly!
That’s because large hospitals usually start out as small hospitals. Then they add a new wing. And then four years later, they add another wing. Then three years later, they add another building, and connect it with a hallway.
So hospitals kind of “Grow” over time, spreading out like an amoeba. Nobody thought out the entire thing 30 years into the future, it just kind of grew that way.
I think the same is true for airports. They start out small: one runway, one terminal, a few gates. Then the metro area grows, and they need more airport capacity, so they add more terminals, more runways. Repeat this process every five or ten years.
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