One of the oddities of invention was that of the segway, this machine set to replace walking. One quote from an early reviewer, "We have to redesign the city" -- Sounded like a rave review at the time. And it may have been, however it's the kiss of death.
We can't redesign a city after the fact. They are stuck that way. They evolve slowly to meet needs, kludge together solutions, and are locked in place. Really, that line was the first sign of failure for the machine.