Autonomous driving in slow traffic is a logical combination of adaptive cruise-control and the lane-keeping systems, already available in some vehicles, which either warn the driver if the car starts to drift out of lane, or apply corrective steering to keep it in lane.

ECONOMIST: Inside story

Its new steering assist feature will keep you in your lane up to 124 miles per hour, but you have to make turns manually.

FORBES: Will Google Kill The Auto Industry? No, And Here's Why.

The innovative system uses radar and cameras to help a car stay in its lane and keep pace with the vehicles around it.

ENGADGET: Inhabitat's Week in Green: energy-harvesting toilet, LED lightbulb overhaul and a floating, solar-powered resort home

Cars that can do smaller functions, such as control a car in traffic jams, keep you inside lane markings or auto-park, are already on the road or about to come to market courtesy of Toyota, Mercedes, BMW and others.

BBC: Blind drivers at the steering wheel