Uber Technologies Inc. expects it will be a long time before one of its biggest investments, self-driving cars, is ready for wide-scale deployment, a senior scientist said on Monday, as the ride-sharing firm gears up to go public.

Raquel Urtasun, who is chief scientist at Uber Advanced Technologies Group (ATG) and heads the group’s unit in Toronto, spoke about the challenges for self-driving development at a Reuters Newsmaker event in New York.

“Self-driving cars are going to be in our lives. The question of when is not clear yet,” Urtasun said. “To have it at scale is going to take a long time.”
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