Have you considered that in common US cities the cars use
approximately 40-50% of all our surface area including roads,
freeways, parking lots, garages, driveways, etc. If we eliminated that
area, theoretically we could potentially be 50% closer to our
destination to start off with and make alternative forms of
transportation more effective.
The cities of the future do not use human operated transportation
because it is inherently inefficient. In fact it is THE MOST
INEFFICIENT ACTIVITY OUR SPECIES DOES AS A CIVILIZATION. Think about
it... When we drive we have to be completely focused on our driving,
otherwise it will cause accidents, resulting in injury, death,
expensive car repairs... this is all without mentioning the secondary
effects of driving which include stress, time, in many cases 2 hours a
day, cost of insurance, cost of the car, cost of repairs.
I am convinced that public transportation is the best way to solve
this and among the tranist options PRTs (Personal Rapid Transit) can
solve all of these problems while giving you the privacy of your own
transit car. I have encountered this website where people can learn
more about PRTs.