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The O2
First driverless cars tested in 4 British cities; rule changes to follow for self-drive future

Driverless cars are hitting Britain's public roads for the first time, giving a glimpse of future travel that's billed as safer and more efficient. Britain unveiled four prototype self-drive cars Wednesday, launching the country's first public trials ahead of a series of planned rule reviews to accommodate the new technology. Officials showed off four types of autonomous vehicles under trial, including a shuttle that looks like a larger golf cart and a compact two-seater "pod." Journalists took short rides on the shuttle, which zipped around a public square outside central London's O2 Arena as curious pedestrians looked on. The project was "still in...