2017 Honda Ridgeline brakes problems

While driving on a one hi way my prevention system detects and on coming car in its own lane perfectly legal and fully applies the braking system without warning or cause then and audible warning and yellow light on the dash telling me to brake, the steering becomes stiff and vibrates and hard to control. Meanwhile the speed of 65 has dropped to 30 MPH and the semi diesel truck behind you is about to run over your car all this happens within seconds not giving me anytime to react very dangerous I've opened a case…

The car has collision avoidance breaking but I noticed a time when a collision was not going to occur and the breaks were applied without me actually applying the breaks. I could have been rearended if there was a car behind be because there was no need to break. A car was a few hundred feet in front of me turning right at an intersection in my lane, and then I was traveling about 35MPH and going straight through the intersection.