Driving on the freeway, husband driving, myself in passenger front seat and 1yr and 3yrs in back. Just touched a 70 zone when the car, without warning/prompt started to deviate from left lane to right lane, at same speed, my husband tried to control car at which point he realized that the steering wheel and brakes were locked and he had no control of the direction or speed and could do nothing to stop the car. The car continued at high speed to drag us to the left side of the road, we smashed at full force into a display maintenance board first, the airbags deployed, and we continued to smash through a barrier and finally into a tree in a field about 100yards+ from freeway. We managed to escape the vehicle and get our screaming kids to safety where we then were picked up by ambulance and police. The car, of course, was unsalvageable. We, by some unknown miracle, made it out alive of this horrific, beyond imaginable experience. This was not normal behavior for a car. We had this car for 2.5yrs, we had no automatic driving capabilities turned on (we didn't have self-drive) and were driving home midday from a grocery store trip on a road we drive frequently. The brakes wouldn't push down, the steering wheel wouldn't move, we were totally at the mercy of the car.