I was going almost 50 miles an hour on a mountain road just north of New York City. Ahead of me, the road curved sharply to the left with just a thin metal railing between the speeding car and a long drop down a mountainside into the Hudson River.

I didn't touch the brake pedal.

Instead, the $120,000 Porsche Panamera plug-in hybrid I was driving slowed on its own, allowing me to steer around the curve. As I unwound the steering wheel, the car accelerated back up to speed on its own

http://money.cnn.com/2018/05/09/technology/porsche-innodrive/index.html


The other, called InnoDrive, is intended for use on twisting, rural roads. You know, the sort of roads where you'd most want to drive a Porsche. Besides radar that lets it detect cars ahead and slow down, it also relies on detailed map data to know when curves or hills are coming up. The car won't steer around the curve -- that's still up to the driver -- but it will automatically slow down, even applying the brakes, to a safe speed for the curve, accelerating back up to speed on the way out.