Like earlier versions, this one needs to have road data downloaded into the car before it can drive without human help.
But in real-world testing on the autobahn, it slowed for traffic, accelerates to speed and changes lanes while the driver enjoys a hands-off automotive experience. It could be a while before the entire system enters mainstream use, especially considering the need for advance data.
But it's already inching forward. The 2013 BMW i3 will come with a Traffic Jam Assistant system that steers, accelerates and brakes the car up to 25 mph in traffic. The functionality is starting to arrive – just not at autobahn speeds.