Mt View studying automated transit to Googleplex. (Community meeting on 9/25)
mercurynews.com
mercurynews.com
Besides Google, who has proven their autobot cars work for miles and miles?
So, unless google has been testing high capacity transit vehicles, 4-person max vehicles aren't what MV is excited about.
At the bottom, there are a couple mock ups of different types of transportation considered. They include: Rubber-Tired Automated People Movers, Monorail, Cable-Propelled Automated People Mover, Maglev, Autonomous Transit Vehicles, and Personal Rapid Transit, etc...
Basically everything is on the table.