Back in March, an Uber self-driving car killed 49-year-old Elain Herzberg in Tempe, Arizona, after failing to do an emergency stop. After a US federal investigation, it is thought that the car did not stop because the system put in place to carry out emergency stops in dangerous situations was disabled . National Transportation Safety Board officials inspecting the car that killed Mrs Herzberg. So, how do self-driving cars actually work? Most self-driving cars have a GPS unit, a range of sensors such as radar, video and laser rangefinders as well as a navigation system.

Tempe, Arizona police released video of the Uber Self-Driving SUV crash that killed a woman on Sunday. It shows a woman push her bicycle on a dark road and the human back-up driver's reaction.This video includes images some may find disturbing. A self-driving Uber vehicle fatally struck a woman Sunday, March 18, 2018, in Tempe. Uber's self-driving car system detected an Arizona pedestrian about six seconds before the vehicle it was in killed the woman in March. But the system never took action to prevent the incident, according to the preliminary results of a National Transportation Safety Board investigation.