They still won't work, but we'll have fun spending lots of
tax money on them before we figure that out (yes I think if you could build a city from the ground up or retrofit an entire street grid to accommodate them then they would "work" in some sense, but that's like saying we could run trains down the street if only someone puts in some wires and track first...).
The first deployments, he said, will be in crowded urban areas and require partnerships with government leaders on regulations and infrastructure needed to support driverless cars. For instance, right now such experimental vehicles need clear lane markings to operate.
Nobody tell them that dirt roads are the next big thing.