One of Google’s self-driving cars has been stopped by police for driving too slowly in Mountain View, California.
The officer noticed that the car was driving at 24mph in a 35mph zone and realised it was one of Google’s vehicles.
He then stopped the car and contacted its operators to let them know it was impeding traffic but did not write a ticket because the car did not have a driver.
In a blogpost, Google responded by saying: “Driving too slowly? Bet humans don’t get pulled over for that too often.”
It later elaborated on why the car was driving so slowly, 11mph below the recommended speed limit.
“We’ve capped the speed of our prototype vehicles at 25mph for safety reasons. We want them to feel friendly and approachable, rather than zooming scarily through neighbourhood streets.”
Google said that in 1.2 million miles of autonomous driving, the human equivalent of 90 years of driving experience, the vehicles have never received a ticket.
The Mountain View Police Department reportedly later admitted that the vehicle was actually driving lawfully.
In September, Google said it would alter the driving behaviour of its vehicles to be more human-like.
Currently, the vehicles are over-cautious and can brake abruptly which has led to minor accidents.
In July, three people that were testing one of the vehicles were involved in a crash with another driver who rear-ended the car. The passengers all suffered whiplash injuries.
Nissan has recently shown off its own driverless technology, although early testers of the new system have complained that it too is overly cautious when navigating public roads.