The only time I ever see two people standing still on a single escalator stair is parents with children or romantic partners - people who are comfortable sharing physical space with one another. Strangers don't share an escalator stair.
So if you let people stand on the right and walk on the left, you're getting higher density and throughput, since you now have one person standing per stair PLUS people walking on the left. It's like turning a 1-lane into a 2-lane street.
So if you let people stand on the right and walk on the left, you're getting higher density and throughput, since you now have one person standing per stair PLUS people walking on the left. It's like turning a 1-lane into a 2-lane street.