The idea of a driverless car has been around for a long time but now the fantasy has edged closer to reality with Mercedes testing one of its prototypes in time for the Frankfurt Motor Show.

You hop in, tell it where to go and sit back and relax. It may sound like science fiction, but many of the key elements are here already. Satellite navigation is now routine,some models can park themselves, or detect other cars and pedestrians. The challenge is putting it all together in a reliable, safe and affordable way.
Eberhard Kaus, head of the Autonomous Driving team at Mercedes-Benz, explained how their model works: “The radar sensors are positioned in the bumpers. The cameras are hidden in the central mirror and there are some computers – that are not standard yet – that process all the incoming data. We are convinced that this technology will make fewer mistakes than a human.”
An autonomous car is not just for lazy drivers, productivity could leap if drivers were free to do other things. Congestion could be reduced with vehicles that always take the best route from A to B, saving fuel. And since most car crashes are caused by human error, a reliable driverless car could also save lives.