The interesting part is that usually those patterns are subtle and hard to detect. In this case Uniqlo was rather bold and made a statement with those escalators: “For every 2 customers in, one or less can go out”.
Designed Inconveniences: UX Patterns That Can’t Be Taught
Juan J. Ramirez
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Alternatively it’s just a simple design decision that more people use escalators to travel up (because ‘effort’) than travel down. The paths are therefore not equal. Designed inconveniences (or ‘intentional friction’ as I like to call it https://smorgasbord.blog/2012/01/27/seduction-persuasion/) do definitely exist, but this is not one of them, in my humble opinion.

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