Oh, I thought your "big ask" comment was about the technology. Sure, you'd have to segregate away pedestrians, but there's already precedent for that with many

Oh, I thought your "big ask" comment was about the technology. Sure, you'd have to segregate away pedestrians, but there's already precedent for that with many roads (no pedestrians on the highways!), and aren't we dreaming about making new cities anyway, rather than retrofitting old ones? "No pedestrians allowed on the lanes which are painted red, not that you'd want to cross that small spiked fence anyway. Just use the overhead walkway like everyone else."