I WAS DRIVING IN STOP AND GO TRAFFIC IN A CONSTRUCTION ZONE. WE WERE STOPPED, THEN IT LOOKED LIKE THE TRAFFIC WAS MOVING SO I STARTED MOVING, I WAS ONLY IN FIRST GEAR THEN THE JEEP IN FRONT OF ME STOPPED SUDDENLY, SO I HIT THE BRAKES, BUT I DIDN'T STOP I JUST KEPT MOVING AND RAN INTO THE TIRE OF THE JEEP. I COULDN'T UNDERSTAND WHY I DIDN'T STOP BECAUSE I WASN'T EVEN GOING THAT FAST. . THE HOOD FOLDED INTO THE ENGINE, SO I WAS NOT ABLE TO START THE CAR. I PUT THE CAR INTO NEUTRAL AND MEN FROM THE FIRE DEPARTMENT PUSHED IT OVER ONTO THE SIDE OF THE ROAD. I PUSHED THE BRAKES AGAIN AND NOTHING HAPPENED, SO I PULLED UP THE PARKING BRAKE TO MAKE THE CAR STOP ROLLING.