I was driving a Buick park ave 2000. After stopping at a stop sign I made a right hand turn onto a busy 3 lane city street. When I accelerated and began changing lanes the car lunged a little and continued to accelerate on its own. I tried pressing the brake and it felt like there was a block of wood underneath it. The brake was not working and the car kept accelerating I was approaching a busy intersection and the light was red. I tried down shifting but nothing changed. I kept trying to brake but.it didn't work and the car kept accelerating so as I approached the red light the only thing I could think to do was try making a sharp turn with the cars that were turning headed in the opposite direction I was going. I managed to slice between two cars in the turn but the steering wheel became incredibly stiff and I couldn't negotiate the turn as hoped. I ran into two cars that in turn were pushed into two other cars as a result of my not being able to break or control the steering into the turn. There were two people who went to the hospital and had injuries.

- Sacramento, CA, USA