This is new?
I had assumed this sort of thing has been happening for years.
I hope there is a serious expansion of the type of roads they test. While it is certain that autonomous vehicles will be seen first in city/town environments, there are a lots of rural roads in the Western world, let alone elsewhere. Where I am in the Dorset/Somerset area just getting from one town to another involves travelling on roads that are (sparsely) signed at the national speed limit - 60mph in a car - but driving at that speed would be suicide. Not to mention that road markings, cat's-eyes, etc. are in many cases in poor repair, and in others simply non-existent.
Scares the shit out of some city types when I give them lifts. For them it is inconceivable that the nearest train station is a 30 minute drive and the lines point north/south, not directly at London.