Google’s self-driving cars still need, well, a driver.

The company released a report in accordance with regulations from the California Department of Motor Vehicles for autonomous vehicles. In the report, Google noted that from Sept. 24, 2014 to Nov. 30, 2015, test drivers in Google’s fleet of self-driving cars had to take control from the autonomous system 341 times.

Of those disengagements, 272 were because of detected technology failures.

More critically, Google reported 69 incidents where “safe operation of the vehicle” required the driver to take over. Of those, Google later determined that 13 of the incidents would have resulted in the car’s running into something if the test driver had not taken control of the vehicle.

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