Mall design: "you never, ever, ever make a straight hallway longer than 600 feet, or a curved hallway much over 1000 feet"

R:

A few examples that I can remember off the top of my head: you never, ever, ever make a straight hallway longer than 600 feet, or a curved hallway much over 1000 feet. If the average American can see that it's more than 600 feet from where they're at to the store they want to go to, they'll leave and go back to their car, intending to drive around to a closer entrance. But, studies showed, once in their car, half of them decide to just simply go home. You can trick them into walking 1000 feet if it's a visually busy place -- sculpture, gardens, fountains -- and even then, only if they can't see that it's more than 600 feet, so the corridor has to turn at least once. Any farther than that and they won't go; it's too far to walk. They also won't go up or down more than one escalator flight.

That's why almost every mall in America has a center entrance on the middle floor of a three story mall, with two or three wings of 1000' length, each wing curved at least once in the middle.