I WAS DRVIING MY CAR ON GREENBELT RD, MD, AND NOTICED S STANGE LOW NOISE OR SPUTTERING..OF SOME SSORT. I DECIDED TO STOP THE CAR...HOWEVER CAR DID NTO STOP...I PUT IN PARK, TURNED ENGINE OFF...DID NOT STOP...I UESED EMERGENCY BRAKE...DID NOT STOP...I FELT IT ACCERELATED ON ITS OWN..AND HAD LOSS OF BRAKE EFFECTIVENESS. I SOUNDED THE HORN LOUDLY TO WARN PEOPLE. BUT THE CAR KEPT GOING AND GOING. I AM A SINGLE MOM, AND MY CHILD WAS WITH ME...FOR SAFETY OF LIFE AND PROPERTY... I INTENTIONALLY DROVE INTO A DITCH. I FELT LIKE IT WAS AN UNINTENTIONAL ACCELERATION AND LOSS OF BRAKE EFFECTIVENESS ISSUE. I HAVE CALLED NISSAN CONSUMER AFFAIRS TO REPORT IT, AND MY CAR IS NOW AT THE DEALERSHIP . I AM NOT AN EXPERT. I NEED FOR A SAFETY INVESTIGATION INTO MY VEHICLE BY AN INDEPENDENT AGENCY OTHER THAN NISSAN. I AM STILL SHAKEN.. ..UPDATED 02/13/17 *BF...UPDATED 02/22/17 *BF UPDATED 08/10/2017*JS *JS