Adam Millard-Ball, a transportation planner and an associate professor of environmental studies at UC Santa Cruz calculated the cost a self-driving car would incur in maintenance, wear and tear, and electricity at 50 cents an hour—less than feeding the meter in most towns, and certainly less than the cost of parking in San Francisco. So, as Millard-Ball explains, self-driving cars would instead circle the block again and again and again.
users coming to Phoenix.
It seems that it will not be the last mile from public transport to home
model but a one to one replacement for the conventional car in urban
areas. So probably little gains from reducing congestion just like
the oversupply of individual houses (sprawl), as opposed to a
range of housing types.