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,…
The problem is that people who want to walk are limited in reality by how quickly the slowest person ahead of them is traveling as well as conventions that make it unlikely that people would get within 1 full step of the person in front of them, reducing the lane's volume to 1/3 (the step you're on plus the step you're taking + space) of the possible occupancy of the standing lane.
So I could definitely see that assertion being true.