As tlrobinson says, I was trying to clarify the content of the article, as the title could easily be mis-interpreted to mean that there were no restrictions. I

As tlrobinson says, I was trying to clarify the content of the article, as the title could easily be mis-interpreted to mean that there were no restrictions. In addition, I suspect that the cars will be 'self-driving' cars rather than 'driverless' (the distinction being that the former has a human behind the wheel, which can take the wheel at a moments notice). As for the rest of the world, from the article: The US States of California, Nevada and Florida have all approved tests of the vehicles. In California alone, Google's driverless car has done more than 300,000 miles on the open road. In 2013, Nissan carried out Japan's first public road test of an autonomous vehicle on a highway. And in Europe, the Swedish city of Gothenburg has given Volvo permission to test 100 driverless cars - although that trial is not scheduled to occur until 2017.