How safe are driverless cars?

The Uber fatality raises questions about the testing of driverless cars and how they mix with people, writes Geraldine Herbert Uber has suspended all tests of self-driving cars after a fatal accident in Arizona last week. It was not the first fatality linked to a driverless car but it was the first time a pedestrian has been killed in a collision with one. Questions are still being asked about what exactly happened, but recently...