I HAD BEEN DRIVING FOR APPROXIMATELY 30 MINUTES. AS I DROVE ALONG I-575 - A 4-LANE HIGHWAY - I NOTICED A KIND OF POWER SURGE FROM MY ENGINE. MY SPEEDOMETER REGISTERED 80 MPH! I APPLIED THE BRAKES BUT WAS UNABLE TO SLOW THE CAR MORE THAN 20-30 MPH, AND THEN IT STARTED TO CREEP BACK UP. I EXITED AT THAT POINT, KNOWING I NEEDED HELP. I WAS STILL GOING MUCH TOO FAST. I LOOKED FOR A SERVICE STATION AND NOT ONLY WAS THERE NONE, WITHIN SECONDS I WAS FACED WITH A RED LIGHT WITH 4 LANES OF CROSS TRAFFIC (GEORGE BUSBY PARKWAY) - I COULDN'T STOP THE CAR! SO I TOOK IT OFF THE ROAD IN A CONTROLLED CRASH, GOING OVER THE CURB, 6 OR SO FEET OF GRASS, A HUGE HEDGE, AND CRASHED INTO A VERY TALL, MATURE CRAPE MYRTLE. THANK GOD THE CAR FINALLY STOPPED. I WAS FORTUNATE THE CRAPE MYRTLE CONSISTED OF MULTIPLE TRUNKS RATHER THAN BEING AN OAK OR SIMILAR. THE CRAPE MYRTLE MANAGED TO DISSIPATE THE IMPACT OF MY CAR AND I ONLY SUSTAINED A BROKEN WRIST. THE AIR BAG DID NOT DEPLOY. MY INSURANCE COMPANY IS CHARGING ME WITH DRIVING OUT OF CONTROL!!!!