The slopes you have to build to get to 10m for a pedestrian bridge are really absurdly long and take up an enormous amount of space, but seems to be the only way to stop pedestrians clogging junctions and causing massive queues when cities get larger. Having some stairs (spiral or straight) with a smaller footprint would be perfect as an option. I've seen lots of people comment about stairs not being accessible for people with disabilities, what about having the option to upgrade the stairs with a lift?
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