In my experience - many systems all over the world, though none as a regular commute since 1995 - the clot of people queuing to stand often severely impacts abi

In my experience - many systems all over the world, though none as a regular commute since 1995 - the clot of people queuing to stand often severely impacts ability to reach the walking side. An even bigger impact is people who aren't good about standing all the way to the right, impeding progress for the walkers on the left. This phenomenon seems to get worse as queues get longer, though that might not be the case in London with its notoriously strong social norms. In both cases, though, a lack of sufficient throughput does impede walkers as well.