Earlier quoted context omitted.
The video shows some sort of shuttle using the track. Those could be small busses or even public transport. http://imgur.com/a/Wv8YD In effect, this is a subway system. It's an underground rail system. The major difference is that you have a mixture of public and private passenger vehicles and smaller vehicles.
It's still incredibly wasteful compared to a real subway. The amount of people a real mass transit system can move is orders of magnitude above tons if individual little cars: http://penguindreams.org/blog/self-driving-cars-will-not-sol... ..not to mention all the energy required to move each of those vehicles compared to a train that can move hundreds of more people in a similar space. Americans need to get over all…
The tunnels could use solar energy which is not wasteful.