I don’t see this work in typical office buildings without significantly reducing the number of people working in a building.<p>I would think elevators will be a choking point, certainly around lunchtime. Let’s say you’re one of the first to go for lunch. If you return, how do you get out of the elevator while others are still waiting to go down?<p>Paternoster lifts (<a href="https://en.wikipedia.org/wiki/Paternoster_lift" rel="nofollow">https://en.wikipedia.org/wiki/Paternoster_lift</a>) might help, but even if you can retrofit them into existing buildings, that won’t happen overnight.