A report by the Insurance Institute of Highway Safety (IIHS) said a March accident where a self-driving Uber vehicle killed a pedestrian in Arizona could have been prevented.

According to the report, Uber had disabled the collision avoidance technology in the Volvo XC90’s safety system.  This brought criticism from the IIHS, who said they believe having the system active would likely have prevented the crash.

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Many autonomous vehicles have human operators in case of emergency,  but police said the person behind the wheel of the vehicle at the time was streaming video on her mobile device shortly before the incident.

The incident caused Uber to stop testing its autonomously driven vehicles on public roads.