(By Anya George Tharakan, Reuters) – Google said it had started testing the latest prototypes of its self-driving cars on Mountain View, California roads, with safety drivers aboard.

The prototypes will join Google’s Lexus cars, which use the same self-driving software, the company said in a blog post on Thursday.

Google’s self-driving Lexus RX450h sport utility vehicles have been in operation for several years.

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