From prototypes to mishaps, here's all you should know about driverless cars

Autonomous cars have been around for a while. Everyone from Tesla and Volvo to Google car and Uber have rolled out automated-driving vehicles. But it has not been a smooth ride so far. Just last week in Arizona, Uber Technologies' self-driving car was involved in an accident, killing a woman -- it was the first pedestrian fatality involving an automatic vehicle. Following this, Toyota has suspended US tests of driverless cars on public roads.