I was driving 55mph (speed limit) down a curvy country road when the steering wheel became stiff and wouldnt turn. A red light flashed and said I had lost steering. I was barely able to get stopped before going of a steep embankment. I was stoped in a dangerous spot with no way get out of oncoming traffic. My vehicle flashed a yellow light that said Terrain management system failure. No only was my life risk everyone that traveled down that road that morning. This included a school bus full of children and several other people that were trying to make it so work just like me.