The accident occurred because the driver was not adequately aware of their surroundings. The autonomous vehicle's braking capability was deactivated, it was the responsibility of the driver to break the vehicle in an emergency.

https://techcrunch.com/2018/05/24/uber-in-fatal-crash-detected-pedestrian-but-had-emergency-braking-disabled/?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAABa492K9Zb0-tvuasnFTetDDCASqQfkwUBjVFd4PjOPBI8yln7A1XJ1Q_OR2HQ-f5QfdllXeeZwh2SNNGVbgyPTFLq1ulI2JE5wfYrzFQ3XIzgBI74VAWciGPRVgogyvKfiUdj3-2efi1zUkMRoqwjsdGH5_BtdZE_-hUMWORkJy