But when he pulled it over, he discovered the vehicle in question was an autonomous one specially made by Google, that drives and makes decisions without the need of a human driver — although two humans were in the car taking notes and able to manually override and take over the controls if necessary.
"The officer stopped the car and made contact with the operators to learn more about how the car was choosing speeds along certain roadways,"
a police statement on the incident said, "and to educate the operators about impeding traffic per 22400(a) of the California Vehicle Code."