Earlier quoted context omitted.
> Another fascinating thing is how escalators have two lanes, one for walking and one for standing. Why doesn't everyone so this?! It's so perfect! Turns out, strangely, that it actually reduces throughput compared to just having everyone stand. So not exactly perfect I guess. But yea I agree in the general matter. When my MIL (a master organizer) visited Japan she thought that was great.
> Turns out, strangely, that it actually reduces throughput compared to just having everyone stand Wait, what? How can this be true? Imagine an escalator w/ both lanes filled with people just standing. Now imagine the left lane starts walking: clearly, higher throughput. Now, maybe you're imagining a scenario where people don't want to walk. Now everyone stands on the right, and the left lane is completely empty. OK,…
Agreed that this is an imagined scenario because people in a hurry will want to maximize their speed by walking/running up the escalator.
More importantly, people generally (I'm imagining) do not want to stand on the same escalator step as another person, especially if they are strangers to each other.
That means in a 2-lane standing escalator there will be breaks between people standing to the left or the right which, effectively, will turn a 2-lane standing-only escalator into a "1-lane" standing escalator.