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Google testing prototype cars

Google Inc has begun testing its self-driving cars in Austin, Texas, expanding efforts to gather information on how the prototypes interact with traffic, road conditions and people.

Google has been testing self-driving prototypes since 2009, mainly around its Silicon Valley headquarters in California. It is sending a second specially-equipped Lexus RX450h prototype to Austin this week.

Last month, the company began testing tiny, bubble-shaped self-driving prototype vehicles.