Between futurama pneumatic tube, and walkalators, are there any other proposals for infra scale "pedestrian" mobilitiy. Faster/less walking seemed like one of t

Between futurama pneumatic tube, and walkalators, are there any other proposals for infra scale "pedestrian" mobilitiy. Faster/less walking seemed like one of those things futurist urbanists use to waste time speculativing now, now we've settled on escooters and exoskeletons?