There's no need to imagine, what you're describing already exists in Europe. We already know how to do this with today's tech, no need to wait for anything. It

There's no need to imagine, what you're describing already exists in Europe. We already know how to do this with today's tech, no need to wait for anything. It's as simple as public transport + bicycles + dense mixed use zoning. > Then imagine cars halve in size and drive bumper to bumper and twice the speed. You're describing trains/trams.