Phantom braking, or was it?

[TheProton]

So this happened.

Driving on 80 in SF bay area. Following the pickup in front on autopilot, suddenly autopilot backed off the car in front slowing quickly. I was thinking of overriding it when I saw the car in front of me rear end stopped traffic in front of him. Autopilot radar was able to see traffic i could not, glad I didn't hit the accelerator. Watch closely and you can see the distance to the pickup increase right before impact. Luckily slow speed collision.

See below, action at 0:46

 

[Jedi2155]

Phantom braking tends to be when there are no cars in front of you at all then you get a random BRAKE CHECK

 

[TT97]

The car will often see the car in front of the car in front. I even noticed once that I got the warning tone and on the screen, the red car was the car in front two away from me (and not the car directly in front).