Combined with transportation platforms such as Uber, I wouldnt be surprised to see fleets of robotic taxis exclusively servicing dense urban areas in the next 15 years. Its one of those great problems that can scale locally if an enthusiastic city council or government get behind it. Something like an extension of what London has done with their congestion charge: http://en.wikipedia.org/wiki/London_congestion_charge
Just imagine the transition to an inner city driverless fleet. No more parking problems in metro areas. Massive swathes of real estate become available as parking bays are no longer required. Markedly faster travel from A->B as networked cars work together to ensure optimal traffic flow. Once all the meatspace human drivers are off the grid, you can remove traffic lights.
Australia is well placed from a rural transportation perspective - we have many small towns 500km apart and plenty of road freight. Accidents on these roads are usually from driver fatigue, speeding or hitting wildlife. These roads are 'easy' for driverless cards - long and straight, not many surprises (except the odd kangaroo which I think the cold heart of an AI would handle better - the worst thing you can do is swerve to avoid them and roll your vehicle).
I think when the kids of 2150 sit down in history class to study the 20th century, they'll laugh at the idea that every family invested significant money into 1-2 expensive hunks of steel for transportation. We fling these big dirty hunks of steel around at 100mph for perhaps 5% of the day. It can get quite dangerous! Then we waste huge amounts of land by storing them for the other 95% of the day. How bizarre is that?