When a robot car makes a mistake, a human always gets the ticket

Whether it's the person sitting in the vehicle or the one who designed it, where responsibility lies when a robot car commits a traffic offence is not always clear

When a California cop pulled over a Google self-driving car for holding up traffic this week, he knew he couldn't send its robot driver to jail. But exactly where the responsibility lies for traffic problems caused by autonomous vehicles is not always so clear.

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