I was driving on the entrance road to a major highway, and as I approached the curve in the road and pressed on the brakes to decelerate, the vehicle began to shake, and as I pressed the brakes harder to slow down, they did not engage, the front wheels became locked in the position of the curving road at an angle and the vehicle went off road at approx 45mph down an embankment and into a tree. The air bags did not deploy. The vehicle is totaled and although there were no fatalities minor injuries did occur since the airbags did not keep the passenger nor driver from hitting there head on the windows and door jam, and the steering wheel.