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Google's self-driving cars may have an impressive safety record – having never caused an accident in more than a million miles of driving on public roads – but the company admits that their ultra-cautious approach can make them a little unpredictable and annoying to other drivers, reports the WSJ. Examples include taking a very wide approach on turns, and braking at the slightest sign of danger.

The cars are "a little more cautious than they need to be," Chris Urmson, who leads Google's effort to develop driverless cars, [said]. "We are trying to make them drive more humanistically" ... 

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