I NOTICED THIS ISSUE A FEW DIFFERENT TIMES AND THOUGHT NOTHING MAJOR OF IT, BUT FOR WHATEVER REASON MY TRANSMISSION WOULD CONTINUE TO PROPEL THE VEHICLE FORWARD REGARDLESS OF THE VEHICLE WAS IN NEUTRAL AND ALSO NOTICED THE VEHICLE WOULD OFTEN TIMES CONTINUE TO ACCELERATE AND FAIL TO ENGINE BRAKE AFTER MY FOOT HAD LET OFF THE ACCELERATOR. THE LATTER OF WHICH I WAS MORE CONCERNED ABOUT AND WAS GOING TO HAVE A MECHANIC LOOK AT IT NEXT TIME I TOOK THE VEHICLE IN TO GET SERVICED. HOWEVER, BEFORE I WAS ABLE TO DO THAT I WAS INVOLVED IN A MOTOR VEHICLE ACCIDENT THAT TOTALED THE VEHICLE. I WAS DRIVING IN A RURAL AREA AND APPROACHED A SET OF TRAIN TRACKS. I WENT TO SLOW DOWN TO CROSS THE TRACKS VIA ENGINE BRAKING, BUT THE VEHICLE CONTINUED TO ACCELERATE. I ATTEMPTED TO USE THE BRAKES TO SLOW DOWN BEFORE I REACHED THE TRACKS, BUT THE DELAYED RESPONSE AND THE GRAVEL ON THE ROADWAY PROVED NO AVAIL AT SLOWING THE VEHICLE AND I HIT THE TRACKS GOING MUCH FASTER THAN I WOULD HAVE LIKED, AROUND 40 MILES PER HOUR. THE ROUGHNESS OF THE TRACKS CAUSED MY FRONT AXLE TO SNAP, YANKING ME TO THE RIGHT OFF THE ROADWAY, THROUGH SOMEONE'S YARD AND INTO SOME TIMBER. WHAT I THOUGHT WAS ALSO CONCERNING WAS THE AIRBAGS FAILED TO DEPLOY AT ALL DURING THE ACCIDENT.