[jrbancel]

> Standing is denser than walking, so the throughput is greater

Doesn't this depend on the walking/standing density ratio and walking speed/escalator speed ratio?

Let say the walking density is 1/2 of the standing density. If the walkers walk at the speed of the escalator (i.e. their speed relative to the ground is 2x the speed of the escalator), then the throughput is the same.

[frosted-flakes]

Holborn's escalators are over 23 metres tall, as tall as a six or seven storey building. Very few people will walk up the entire escalator, essentially limiting utilisation to 50%.