Everyone is so tentative like "it can't be done". It is being done right now. Not on a track, in real life. Driverless cars can see in all directions at all times. When a driverless car gets in a bad situation, it doesn't panic and is programmed to just stop or find the best safe state. Driverless cars don't drive in the wrong direction on a crowded highway.Google has logged in over 1 million driverless miles.
In 20 years, we'll be lamenting the days when your friends and family perished in car accidents. Pray to whatever God you believe in that you make it to that day, because the most dangerous thing you do every day is get in your car and put your life in the hands of strangers.