I keep hearing about this, but I don’t think it’s quite ready for prime-time:
In the programme, Mercedes drives 3 S-classes behind each other. The first car hits the brakes, and the two following cars brake down automatically, to avoid a crash. In theory. In practice, the first car braked, and the two others continued right into the back of each other, resulting in a 3-car pile-up at the test site.
In the article they go on to say that the problem was the hall where the test was conducted. It was made of steel.
So, what happens if you need this to work while you are on a suspension bridge? Or some tunnels?