I was driving on the highway when the car in front of me applied their breaks - I took my foot off of the accelerator but the car did not slow down. I applied the breaks but they did not work - in fact, the car seemed to accelerate. I heard the collision alarm sound but the automatic emergency braking system did not engage or stop the car, so I crashed into the car in front of me. Air bag deployed and then the car filled with smoke from the batteries but I couldn't get out as the power locks didn't work or allow me to open the door. The EMT's had to break the rear window to get me out of the car